Fic request and fic search...

[harley-holiday.livejournal.com]

I've read a few stories wherein Harry watches Draco masturbate and then joins in, but what I'd like to read more of are fics that have Harry observing Draco having sex with someone else. Bonus if Harry doesn't already have a crush on Draco. Additional bonus if this scenario takes place at Hogwarts and the other person involved isn't Snape or another teacher.

Speaking of- I remember reading a particular story in which Harry goes into a bathroom and listens in on an encounter between Draco (who he might or might not have been stalking) and Zacharias Smith. I can't seem to find it again. Anyone know which one I'm talking about?

Thanks!