It wasn't a pickup line, per se, but here goes....
I used to play in a band, and everyone thought that the guitar player (Carlo) and I (Phil) were brothers.
One time on stage I was playing, while on my knees. All of a sudden, the hands of these 2 really cute girls found their way up my leg, to my... uh... goods. I couldn't move. Didn't really want to. LOL
Anyway, after the show, I split home to my girlfriend.
I found out the next day that BOTH the girls went up to my guitar player, and basically attacked him. They were all making out together, when one of the girls started telling him about these new condoms that they had been wanting to try out. All things were shaping up to be QUITE the night for Carlo, when....
The OTHER girl says, "Hey wait... YOU'RE not Phil!"
They both walked away from him. hahahahaha
Sorry Carlo.