is there any other reason why?

Cheating. just reading about it may bring you goosebumps, not just because it's a controversial subject, but also because it's so difficult to define.
Cheating on our boyfriend can bring out a few issues:
1. the relationship is dysfunctional.
2. we have already talked about it and we decided to have an open relationship.
3. we make a difference between making love with each other, and just screweing around other men.
4. don't know, don't care.



Most times options #1 and #4 can be the answer, because we either don't want to discuss it, or just because we don't care. This may happen especially in big metropolitan areas where being gay is not a big issue, and finding a partner may take you just a few clicks on the net.

Whatever the answer is, please take note of this: do you really love or care about your partner?, if you do, then why don't you discuss about it more openly?

Being loved and loving smeone else means getting to know each other, and having the freedom to discuss openly any subject, even if one of the parties doesn't agree, we all should have the freedom to express ourselves and to be heard. Also, if we are in a relation (despite the fact whether you agree or not on cheating) listening to your partner and discussing your points of view should  be critical to have a healthy relationship.

After this point is settled, and you have agreed to at least talk and/or to listen to your partner, comes the big question: what should I do with this decision? accepting or not being with other guys?.

This is totally up to you. There's so many relationships in this world, as there are different guys and different cocks out there (not to mention pussies!). So, be honest with yourself, if you don't feel comfortable with this decision, then tell the guy how you feel and try to reach a balance that works for both of you. Maybe it will work, maybe it won't; but that's a part of the ride, isn't it?