I wouldn't vend condoms but I don't have a problem with the concept. What I think was poorly-thought-out was the sign. He could have said the same thing without the double-entendre which will no doubt offend some customers. At my car washes, the only customers I can afford to offend are the mudders.
Btw, tried a new concept yesterday. To start with, it is IMPOSSIBLE to miss the signs stating out policy on excessive mud in my open bay. Impossible! So, when the cowboy that came yesterday left me 300lbs of mud on the floor, walls, hose, bill acceptor, Wash Gear reader, I knew he intended to. I got his tag from a camera, found he lives in Houston so he probably thought "Hey, what can he do about it, I live 500 miles away." I sent him a bill for $250 and a note that said if he doesn't send the money he'll be invited back to West Texas to Small Claims Court. If he ignores that I may sick a collection agency after him too.