"It's not you, it's me" + first time for harry/ginny please

Ginny desperately wants to shag her boyfriend. Except every time she thinks things are headed in that direction, Harry finds some insane excuse to vacate her flat, or in one case his, as fast as possible. She isn't sure what it is going on, but she's starting to think it's something to do with how he feels about her. Ginny confronts him one night only to be met with the most surprising of explanations.

"It's not you," he says. "It's me. I don't want to scare you, but... I have a giant penis."

SEND ME 2 TROPES AND A SHIP