Two men are carpooling home from work one evening. While they're stopped at the signal, they look over on the sidewalk and see two dogs screwing.
One man says," I wish I could get my wife to let me do that with her."
The other man says, "It's easy, after dinner you just give your wife 3 martinis and she'll let you do that."
The next morning the second man picks up the first for work and he looked really tired. So he asks, "So how'd it go with your wife last night?"
The exhausted man said, "Man, it took a lot more than you said it would. After 3 martinis she let me do it doggie style, but it took 8 more before she'd let me do it on the street corner."