Do You Sell Condoms?

A sixty year old man walks into a big drug store and walks up to the girl at checkout #3. He asks her, "Do you guys have condoms here?"

She says "Sure. What size are you?"
"I don't know" he replies.
"Well, just let me check" the cashier volunteers. She unzips his pants, takes a feel, and then she says over the intercom, "EXTRA LARGE CONDOMS TO AISLE 3, PLEASE. EXTRA LARGE CONDOMS TO AISLE 3."
A stockboy brings the condoms. The man pays for them and leaves.

Later, a thirty year old man walks into the store and up to checkout #3.

He asks the girl, "Do you sell condoms here?" The cashier replies, "Sure, but what size do you need?" He says "Well, I don't know." She says "Just let me check here." She unzips his pants, takes a couple of tugs and then says over the intercom, "LARGE CONDOMS TO AISLE 3, PLEASE. LARGE CONDOMS TO AISLE 3."
A stockboy brings the condoms. The man pays for them and leaves.

Seeing this, a fifteen year old boy who hopes to get lucky goes up to the girl at checkout #3 and asks sheepishly, "Um, ah, do you guys sell any condoms here?" "Yep" she says. "What size do you need?" "I don't know" he says. She unzips his zipper for a feel, pauses and says over the intercom, "CLEAN UP IN AISLE, 3 PLEASE. CLEAN UP IN AISLE 3!"