A huge... huge erected penis.
When you'll see one you will go
o.o face
You will be surprised by its growth. You will want to probably hump it ; as long as it's your boyfriend's one.
If it's yours or his , you may both be lucky.
He : Dude... It's HUGE
She : *cough**cough* tremendous boner.
He : I would put it in there... If you want.
*FEMALE WINS AND GETS THE PRIZE!*