Joke for the day

Rico says his friend Kelley forwards this one from Russell, his brother-in-law:

Saturday morning I lucked out and was able to buy several cases of ammo.  On the way home, I stopped at the gas station, where a drop-dead gorgeous blonde was filling up her car at the next pump. She looked at the ammo in the back of my truck and said, in a very sexy voice: "I'm a big believer in barter, big boy. Would you be interested in trading sex for ammo?"
I thought a few seconds and asked: "What kinda ammo ya got?"