Grandpa

A young bloke was about to be married and he was talking to his Grandfather about sex.....
He asked how often he thought you should have it...
Grandpa said........ 'When you first get married, you want it all the time, but it tapers off as years go by...You may only have it once a week or so..Then as you get older, you may only have sex once a month and when you get really old you may only have it once a year..maybe on your Anniversary....!"
"Well" said the young fellow..."How about you and Grandma now?"
Grandpa replied..."Oh we just have Oral Sex now...!"
"What's Oral Sex, Grandpa?"...said the young man..
"Well"...Grandpa said..."She goes to bed in her room...And I go into my room...And she yells...F**k You and I yell back...F**k You too!"