please help me find an episode!

For the longest time I've been trying to find a certain episode, but I don't know what it's called. If it wasn't from this series, someone please let me know. Here's the description:

A guy lures a girl up to his room with the promise that he can brew a great cup of coffee. It turns out he has no coffee, but they end up having sex anyway. Their pre-sex dialogue goes something like this:
"Did you lure me up here just to have sex?"
"Would that be a bad thing?"
"Let's find out."