"Sister, how many times do I have to tell you to knock? I'm jerking off."

I would have come from a blowjob too, but she was asking for sex, so I couldn't resist

Well, how am I going to get pregnant if all my sperm is on my butt? I tried so hard

Jerk off to a sleeping woman, she'll sit on your dick when she wakes up (but that's not certain)