I'd also just like to point out how ADORABLE, childlike and innocent Piper acts/looks in this season, it really is a stark contrast to how she becomes a confident, strong mother towards the last few seasons. For example, the arm swing at 1:49 at is something you'd never see her do in Season 4 upwards, just goes to show how much Piper develops. And of course, we can't forget about those bangs lol
And if you want to get even more nitpicky, the first time they met canonically was in season 3 episode 17 “Pre-witched” in a flashback where Piper and Prue are walking outside and Piper accidentally bumps into Leo.
Phoebe is so annoying,hitting on Leo just because Pipers into him. Just like when he said "i saw him first" when he saw the chemistry between Dan and Piper