It is not uncommon for a man to say 'I m Bi because it is too hard to admit to themselves it might be a case of I'm gay, I was married to a man who decided to get on the other bus, and a friend married a man she understood was Bi neither relationship lasted both of us managed around 11-12 years of it though
Yes cheating is cheating, just because it is with a person of the same gender doesn't make it any better, My friend thought she could cope with sharing on the basis she felt he would not get emotionally involved with another man,,,,, he did and at that point they called it quits. Another of my male gay friends was married for some years he has children who were in their late teens when he left , Transvestitism is another thing altogether, there are many straight transvestites who maintain close and loving relationships, it is all about trust at the end of the day..