That's the problem dude, one can lead to another, that's why
have to maintain wariness and alertness at all times... Touching
can lead to petting, and then lead to rubbing and then to stroking,
and before you know it, masturbation and then sex... hahaha... just
be extra careful the next time, when you take your wife out in such
occasions...
I believe that once you're in the process of achieving orgasm and
sexual stimulation, you are in a world of your own, and that world
comes first... 