a 78 year old couple walks into a sex therapist's office.
They ask the doctor to watch them as they have sex. He hesitates at first, but allows it.
They make love and ask him if he saw anything out of the ordinary.
He said "no".
They came back the next week with the same request... and the next week...and the week after that.
Finally, the doctor asks them: "why are you insisting I observe you two having sex every week, when all appears normal?"
The man say:
Well, ya see doc... she's married, so we can't go to her house. And I'm married, so we can't go to my house. The hotel costs $119 per night.
The doc says: "So?"
The woman replies: "Well, coming here, it only costs $50 and we get $35 of it back from medicaid!"