Guy #1: I’m not worried about having children. If I’m 50 and I don’t have kids, I will still be happy.
Guy #2: At 50 you could still have kids. You’d just have to knock up a younger woman.
Guy #1: I couldn’t handle being with a women 20 years younger than me. Too much different slang to deal with.
Guy #2: What?
Guy #1: Yeah, that’s the biggest reason I don’t sleep with 70 year olds. 

–A train