A guy goes into a drug store to buy some condoms. The girl behind the counter asks, “What size?” He says, “I don’t know.” She hold up one finger and asks, “That big?” He says, “Bigger.” She holds up three fingers and asks, “That big?” He says, “Smaller.” She holds up two fingers and he says, “Yeah, that’s it.”
She sticks the two fingers in her mouth and says, “Medium.”