The Scientific Smelly Challenge ft. AskKimberly 

It's so cute how they chose each other's shirt.

"Omg we're so in love!" Awww. 😊

Dead. Cause of Death: Extreme adorableness because they chose each other's shirts. No relationship goals met or will be met on my side.

Haha, that's so cute that they chose one anothers!! There's probably scientific reasons why, but it's still cute af.

The adorbs killed me a little bit when they realized their favorite was each other's shirts.

i love this channel because you combine science with fun. I wish you guys were my teachers!

I love how Greg chose Kim's shirt like a Bro's shirt, friend but not really attracted to it, and loved it... maybe because she has a similar genetic makeup to Mitch which makes the whole "they picked each other's shirt" thing even more cute

Also, you guys are too cute preferring each other's shirts!

The fact that they picked each other's shirt and at 6:58 They both fixed their hair!

You guys should collab with superfruit. You even share a name

Gregg is so adorable he makes me smile so much!

Jesus, this was so cute. "Oh my god, we're so in love!!!" AAHHHH!!!!! TO KAWAII!!!!!!!!!

"Omg we're so in love!" Hahhaa XD awwhhh u guys are awesome.

I adore them so much... The fact that they picked each other's clothing shows that they're actually made for each other 😍😍😄

What? Two of my favourite youtubers are siblings... MIND BLOWN

The fact that they were so happy about choosing each other's shirts is honestly so cute ^-^

Mitch and Kimberly look sooo similar!!!

Awwwww when you two realized you chose each others shirts I practically died from the cuteness!!

Even science ships them

aww they chose each other’s shirts that’s adorable

INTERNALLY SCREAMING BECAUSE OTP

Mitch and Greg are officially my new favorite (celeb) couple

that was the cutest thing ever

Greg seemed pretty close to choosing Kimberley's shirt though! That may have been awkward.

this is so cute❤ they should get married!

That was like the cutest thing ever !!! You guys are so adorable together !! I almost cried of happiness when you chose one anothers shirts!! So cute!

What I got from this is to smell random people to find my soulmate lol jk

This was hilarious lol, You guys and Kimberly had me laughing Thank You it takes alot to make me laugh

it made me so happy that they picked out each others shirts

Omg when you realized you had each others was so cute! Love you guys

Awww it's so cute they picked each other's shirts

Awww they are the CUTEST thing ever.

This made my heart so happy oh my god. 😭❤❤❤❤❤❤❤❤

Omg! I just saw your sisters video! I had no idea you guys were brother and sister but I was subscribed to both of you! Hahahah lol.

THEY PICKED EACH OTHERS SHIRTS SO CUTE AHHH

I love your channel and your content so much! So clever xx

Am I the only one who thinks that Kimberly and Mitch have the same hand movements?

Omg it's so cute that you picked each other's shirts! This is really interesting!

I ship them both wholeheartedly

When Gregg said 'cheese sandwhich' i got a really strong taste in my mouth of cheese sandwhich, despite the fact I haven't eaten one for days. I was just wondering if this happened to anyone else.

Aww this was the cutest thing ever

The fact that they chose each other's shirts is too freaking cute I'm dying

RELATIONSHIP GOALS! OMG

This was WAY too adorable! :D

Otp goals

This was soo cute in a weird way. But like in a very good romantic kind of weird.

THIS WAS TOO CUTE Y U DO DIS I'M FANGIRLING BECAUSE YOU TWO ARE JUST SO CUTE

Aw so cute they pick each other

I don't think this necessarily supports pheromone parties. They may have made an association between the scents that they smell when they are around each other and the joy they find in those times.

That was completely silly, but also cute and interesting :) Kim seems really sweet too, you're a lucky brother, Mitch!

wowwwww ma science teacher showed us 1 of their vids today and admitted that u guys are really good at teaching science

“We’re so in love!”

OMG that's toooo sweeeeet! Why you two guys are soooo cute!

Hey guys, idk if you'll read this but I loved your book, one of the most entertaining by far, and I don't read Lol. Im so hapoy my curiosity is killed sbout weird scientific topics.Good work, you should make another!!

Love you guys!!

I absolutely loveeeeee this channel c:

You guys should do a video on cancer, I think that would be really interesting.

Well that's given me the warm and fuzzies.

Well there goes my heart

That was very cool

Kimberly is wearing the same color nail polish that Greg sometimes wear. :)

SOOOOOOOOOOO CUTE STOP IT

How Romantic! By the power of science your love is true!

Haha this seemed set up just because I feel like Greg was super ready to pick that Herbal Essences one.

I found this video a tiny bit boring but when they chose each others clothes I was in awe lol So cute

I'M SO EXCITED TO SEE THIS VIDEO FROM HOW EVERYONE IS TALKING ABOUT IT IN THE COMMENTS! :'3 But just a bit from the first few seconds, can cats be attracted to pheromones? Just because, I'm the one who feeds my cat, i play with her and hug her a lot, i let her out but not so often as others usually do it, my sister was the one who rescued her, i spent the first night with her, was the one to pick her up at and from the vets, spent that night with her, i got her used to going out doors by walking her, so physically it makes sense why she likes me, but even then, the first night my sister found her on the street and bought her home, the cat ran straight to me, and now still she is on/around me or my stuff as much as possible, i need to keep my shoes, and only my shoes in a box with a lid otherwise she suckles them to pieces, and recently she likes to stick her head in between my arm pit and like, rub her face on it, bite it, lick it, all weird things! XD So can animals be attracted to human ones? Cause it just seems weird how she is with my clothes/possessions and me from the start haha

Sister looks alike a lot. Even in facial expressions when talking to camera

The ending was so lovely, seriously I feel so lonely.

Björk in the background :D

Love it!

I heard that when murderers are about to murder someone, their sweat has a noticeably different scent. Also, if an animal is scared enough (humans included) you can smell its fear.

I am so attracted to the scent of some people. Weirdly, when I was younger, I could easily identify if someone had been in our house by the smell that lingered. It even spoiled a surprise visit from a boyfriend because I knew he'd been in our house.

Wow, I never heard of pheromone parties before but this video totally made me want to go :)

You guys are sooooo cute!

This is adorable ♥️♥️

True love: choosing each other's shirts

That was so cute 😍 Omg i can't!

Mitch's siter looks beautiful.

Amazing video!!

Relationship goals omg their so cute

This, I like this

So cute 💕

Great video guys. Your sister was a plus :).

THEY ACTUALLY PICKED EACH OTHER IM LIKE AAAAAAAAAAAAA YALL RLY ARE MEANT TO BEEEEEEEE

i love ur vids

Before 301 club

I can't believe she is your sister!!

KIMBERLYYYYY!!!!!

I thought he liked Kim's shirt the best

my brother plays hokey and his equipment smells bad enough to bring grown men to their knees

MY NAME IS KIM!!!

OMFG you guys are sooo cute.

3rd one on comets boys

LOL Greg is too cute

no surprise but still sweet

god... you two are so(!) cute!

Awww

Never knew that they were in a relationship

1000th like!!!