How to get your woman to come upstairs? Say you are naked.
How to Get Her Upstairs
Explanation
Explain Bear
Listen up, buttercup! The joke is about tricking your chick to come upstairs. You tell her you're "necked," which sounds like "naked," but it ain't proper English, ya dig? It's a play on words because you're probably too dumb to get her upstairs any other way, you troglodyte.