i think that is a crazy idea, why would you seek out a married man,
im particularly annoyed about luring someone behind the wife's back,
and the obvious danger of meeting through personal ads,
i woulud suggest you do it old school and find a nice LGBT friendly bar,
you may also look on "meet-up" and see if there is a group that interests you and join,
what you are looking for is an called an "admirer",
they socialize in those places and they are safer....