A young man went into a sex shop to buy some condoms and a sales girl approached him.
Sales girl, "Can I help you, Sir?
Young man, "Yes, I want to buy some condoms.
Sales girl, "What size do you need, Sir?
Young man, "I didn`t realize they came in different sizes. I don`t know what size I would need.
Sales girl, "May I hold your penis to tell what size you would need?
As she was holding the penis, she called for assistance: "Give me a SMALL one... Wait! Make it MEDIUM...Wait! Make it LARGE... Oh Shit! Give me a TISSUE!"