5:54 what Hae means is that people can still brush their teeth when it is outside because toothbrush are small (in a sense like convenient to bring).. so yeah
It's awful to hear the answer of Eunhyuk that when they will reach the age of 50 and not dating they will end up together. It shows that both of them are infavor of same sex relationship.
First of all why it's "awful". Not being hetero is normal, it's just people caring about each other. Second, that was an example, they weren't talking about each other lmao