A guy goes into a drug store

A guy goes into a drug store to buy rubber pack.

The girl behind the counter says, “What size?”

He says, “I don’t know.”

She hold up a finger and says, “That big?”

He says, “Bigger.”

She holds up three fingers and says, “That big?”

He says, “Smaller?”

She holds up two fingers and he says, “That’s it.”

She puts the two fingers in her mouth and says, “Medium.”