The phrase you use when proposing sexual intercourse
Let's have sex
Let's have a shag (let's shag)
Let's have a f*ck (Let's f*ck)
Lets have a screw (Let's Screw)
Let's have a root (Let's root)
Let's have some luvin'
Let's have some rumpy pumpy
Let's do the horizontal mambo
Let's Boink (Bonk)