Is getting lap dances cheating?

If a guy is dating someone exclusively or married, is it ok for him to go to a strip club and get a lap dance? For those of you who have not been to a strip club, not only does a lap dance consist of a naked woman gyrating in front of the guy but they often touch the guy all over and the guy can often touch/lick/fondle the girl, as well.

What about bachelor parties? If the groom’s friends get him strippers and they are naked, grinding on him, touching, etc. is this ok?

What about looking at porn?