Les Barker wrote a parody of Living Doll that was along those lines.

It started

Got myself a self inflating, floating, mating
Blow up doll

And went downhill fast. Lovely line about her going down on him.

I once bought a blow up sheep for a stag night. Called her Ewenice of course. She was very popular with the ladies in the night club. At the time I thought it was my magnetic personality rather than the ruminant based sex toy under my arm.

Beer is a fickle mistress at times.