"Anniversary" joke

A very old couple booked a honeymoon suite in a five-star hotel to celebrate their 50th marriage anniversary.

The bellboy while taking their luggage to the suite thinks to himself, "At this age they are booking a suite. What a waste."

After leaving them in their room with a very heavy tip he decides to spy on them. At night he sits in the lobby opposite their room. And what does he hear? Laughing and clapping sounds from their room. All night long he could not believe his ears. In the morning he apologized to the husband for having spied on them, but being very inquisitive he asks him how can he do what he did at this age.

The husband replied, "See it is this way. First I remove my clothes. Then I lie down on the bed face up. Then my wife removes her clothes.

Then the bellboy leans into the old man and says, "Then WHAT?"

The old husband smiles and says, "Then my wife lifts up my penis with one hand, and then we make a bet."

The bellboy hollers, "A BET? What bet?"

If it falls to left, I win; and if it falls to right she wins." the husband replied with a smirk.

The bellboy asks, "Well what if it doesn't fall?

"Then we both win", says the old man with sly grin.