Goldilocks Always Has Trouble Getting It Just Right

Female cashier: I'm tired, and really not sure why.
Man checking out: You want to know what causes tiredness?
Female cashier: What?
Man checking out: Either too much sex or not enough sex. By the looks of you, it must be too much sex.

Albertson's
Baton Rouge, Louisiana

Overheard by: Not tired, so I must be getting enough sex