Put the cock before the buttplug 

To put things in the wrong order or with the wrong priorities. Similar to 'put the cart before the horse', but typically used for sexual situations.

Derived from the fact that a small buttplug should always be used before inserting the cock during anal sex.

Hey, Ralph, don't put the cock before the buttplug and ask those two chicks for a threesome when you just met them!

Put the cock before the buttplug by Ron Jarvis March 5, 2011