"Three Little Pigs Dine Out" joke

The Three Little Pigs are out for dinner one night and the waiter is taking their drink order.
"I'd like a Pepsi," says the first little piggie.
"I'd like a Ginger Ale," says the second little piggie.
"I'd like water, lots and lots of water," says the third little piggie.
The waiter brings them their drinks and takes their orders for dinner.
"I'd like a nice big steak," says the first little piggie.
"I'd like the chicken salad," says the second little piggie.
"I want water, lots and lots of water," says the third little piggie.
The waiter brings them their dinners and returns later to see if they would like dessert.
"I want an ice cream sundae," says the first little piggie.
"I want a Root Beer float," says the second little piggie.
"I want water, lots and lots of water," the third little piggie exclaims.
"Pardon me for asking," the waiter says, "but why have you only ordered water?"
"Well, someone has to go 'Wee, wee, wee, all the way home!'" replies the third little piggie.