Don't read if you are offended easily. This thread is for the most offensive jokes. 1. Why did the Americans use 15 000 rounds of ammunition per killed Vietcong in Vietnam? A: Because 14 999 of the shots hit their buck teeth. 2. What the best thing about sex with twenty-three-year-olds? A: There are 20 of them. 3. Why is it called PMS? A: Mad cow disease was already taken.