A body builder walks into a bar, and after a while and a few drinks, picks up a girl, and decided to head back to his place. By the time they got home he saw that the girl was so excited that he rips off his shirt, points to the bulging biceps and says, "See these baby - 1000lbs. of dynamite!"
The girl becomes even more excited. Seeing this, he then tears off his jeans, points to his muscular thighs and says, "See these baby - 1000lbs. of dynamite!"
The girl can hardly contain herself at this point. So finally, he drops his "fruit of the looms". The girl jumps up and runs for the door, the guy catches up with her and says, "Baby, where are you going?"
She replies, "With 2000lbs. of dynamite and such a short fuse I was afraid you were going to explode!"