This kid was graduating high school and he shares a bunk bed with his little brother.
He brings over his girlfriend and he says
"If you want a new position say lettuce"
"If you want it harder say tomato "
So they get to doing it she says
Lettuce,
Tomato,
Lettuce,
Tomato,
Stop!Stop!Stop! Pull out I can't get pregnant
The little brother yells up there can you guys stop making sandwiches up there your getting manyiose all over my face lol

Wow, that is the oldest joke that I thought I would never see in my life again.