The serious conversation you bring up to your girlfriend/wife/fling about doing anal.
Debano " Listen. Babe. I got a Pooposition for you."
Beky" I'm listening."
Debano" If you allow us to experiment with back door penetration...I'll go shopping with you more..."
Beky" Alright! But we must use mass amounts of lube!"
when you are trying to say that something is the opposite of something, but it's either bad or hilarious.
I'm the pooposite of drunk right now.