Fapmaster17 I could go on and on because there are some scenes that are great just because the girls are hot like All Grown Up, Pleasure Trip, Grand Obsession, etc. So will try to focus on ones where I think the BGG element specifically plays a role in the scene being great:
Modern Relationships is a classic of course and I don't even like MILFs usually. I think fucking both separately and then together is a winning formula. Thinking about it now, this would've been amazing with All Grown Up.
See What I'm Seeing because Kylie Quinn and even though I didn't know who Honey Hayes was she was awesome in that scene. I love these scenarios where it's one innocent girl
Resting Roommates I consider a classic, such a hot scenario and how it plays out in the scene.
I'll stop here by saying that one scene I liked an unexpected amount was The Coeds. Before I didn't even think Braylin was that hot and the other girl in a vacuum I don't think is like "super sexy", but holy shit man she got me going crazy by playing that innocent shy role to perfection. She looked like a true newbie out there in the hottest way possible, and them kissing each other was super hot in that scene