Favorite euphemism for sex? KEEP IT CLEAN

Up in them guts. Giggedy her gashmoigan. Googidied her gaflavor.AirGuitarist87

That's Quagmire!

Playing Chess.

Pulling the pin on my love grenade.

I'll show you mine if I can put mine in yours.

Testing the springs.

Gettin freaky on the squeaky.

Mouthwash and blow dry.

Stevie Wonder.

Gonna go Elvis in your pelvis.

Making love.

Play the baby lottery.

Every hole is a goal.

Scaring the neighbours.

Going down the waterslide.

4 Wheel Pickup [word here rhymes with truck]

Those are all my favourites.