15 inches
These three guys go camping: Joe, Frank and Bob (insert your friends names instead). They get camp all set up and these bandits come along and start tearing up their campsite and take all their money.
The bandits tie up the three guys and are going to kill them. Joe speaks up and says, “Is there any way you’ll let us live?” One of the bandits says, “Well let’s see here …if all your penises together in a line equal 15 inches, we can let you go.” The guys say, “O.K”
Joe whips out his penis - it is 7″ exactly. Frank whips out his - it’s also 7″. Then Bob takes his out - it’s 1″. The bandits say “Ok, 15″ you guys are free to go.”
As the guys are walking away Joe says, “Man I’m sure glad I was 7″. Frank replies, “That was close.”
To which Bob says, “I’m just glad I had a hard-on.”