"For example, a.... later - but we haven't had hot sex anywhere since."
Definitely overcame "place conditioning" with that one.
I'm doubtful anyone has yet done studies on place conditioning as it relates to sex in relationships, but I sense soon we'll be seeing some grad student at work writing it up.
When he's in town, go somewhere remote in a bikini and phone him up, tell him you have a flat tire and when he shows up, give it to him good.
I'm gonna do that this afternoon, sans the bikini.