i think my wife and i draw the line in similar ways.
anything physical - kissing or above - is definitely cheating.
anything below that is ok in the proper context - strip clubs, ****, etc. are all fair game. email/phone contact is ok. dinner/drinks in a group is totally ok. even dinner 1-1 with a coworker is ok if it has a purpose. in our business so much work is done based on relationships that you have to have personal and social contact with clients and coworkers.
that woman who said looking at other women = cheating is a retard. she's going to live her life alone (unless she's already married to Doug Christie )