A man walks into a toilet store and asks the manager, "Can I buy a toilet?"

The manager says, "Of course, we have three, a wooden toilet, a metal toilet, and a singing toilet."

The man replies, "I'll take the wooden toilet."

Later, another man walks in and says to the manager, "Sir, I'd like to buy a toilet."

The manager replies, we have two left: a metal toilet and a singing toilet."

The man says, "I'll take the metal toilet."

Later, another man walks in and says, "Sir, I'd like to buy a toilet."

The manager says, "Sorry but we have one left and it is a singing toilet."

The man says, "I'll take it."

Later, all three of the previous men who bought toilets are back.

The first one says, "Sir, I do not like this toilet because everytime I sit, I get splinters in my butt."

The second says, "Sir, I dont like this toilet because it makes my balls too cold."

And the third guy says, "Yeah? Well I don't like my toilet because everytime I sit down it sings, Do You See What I See?"