Medjai saidI don't think bi guys are any more likely to cheat than straight or gay guys. A cheater is a cheater, completely independent of their sexuality.
Dating a bisexual requires no more trust than anyone else.
I agree that a cheater is a cheater.
As for bisexuals that raises an interesting situation. I could theoretically see a bi guy who is happy with his gay man and doesn't have any interest in cheating with another guy since he already has a guy. But if he is also sexually attracted to women, he doesn't have anything in hand to compensate for that, giving him the urge to fool around with women.
There have been married bi guys on RJ whose wives let their guys pursue their interest with gay men. Then there are those who are married to women as heteros, but realize that they are gay, or bi, and are on RJ as an exploratory phase in their life.