Would you like to know the size of my balls?
You have to get a good grip, pull back, and release; repeat until satisfied.
Would you like to get forked?
If I told you to lie on your back, with your legs spread in the air, so I could try to mimic the greats; would you tie this elastic to your ankles?
Is that a catapult in your pocket, or are you ... ? (one for the ladies)
If I told you, you remind me of a catapult, would you ... I think I'll stop there, and you guys can finish that joke (if you want).