If Roger had to take a guess, he would have figured that it all had a little to do with both Angelina's group of friends - the Weasley twins in particular - and their Gryffindor nature. Though, he did take into account that McGonagall was a Gyffindor and she didn't seem like she would have done half the things that these Gryffindors were rumoured to do.
Roger's lips twitched into a grin. "I don't see why they would. You have a great set of legs." Or so he thought from what he could see of them. It wasn't as if Angelina ran around starkers for him to really appreciate her body, bur she really should have.