Bisexuality Support Group
Bisexuality is a sexual orientation which refers to the aesthetic, romantic, and/or sexual attraction of individuals to other individuals of both their own and the opposite gender or sex. Most bisexuals are not equally attracted to men and women, and may even shift between states of finding either sex exclusively attractive over the course of time.

I am a transgender woman and have been married to my wife for 18 years. I just recently came out to her which has been rough. I can't say that I am actually bisexual but I suppose bi-curious might apply. What I wanted to reply to was your thoughts about your faith. Religions of every faith have condemned non traditional sexual relationships for a very long time. There was a time when some of them revered them but not so much these days.
I am going to share my views about how your sexuality fits into religion. Especially the Christian religion. Of course, there are a lot of flavors of Christianity but the tenants are very similar across faiths. Most the the extremists will toss Leviticus into your face every time that you talk about anything that is considered gay. Doesn't matter what the style is but if you are "gay" then you are wrong but even more so for a man with a man. Because of course that's the quote from Leviticus. Of course, in that same book there are similar passages about being cursed if you wear clothing made of mixed fibers. If you sleep in the same house as a woman on her period and so forth. The point is that religious "extremists" use only what fits their agenda. Other than a nudist who doesn't wear clothes made from mixed fibers these days? Give me a break.
God created you. He would not create an abomination that He abhorred. What would be the point in that? You can't change who you are. You were created that way. As long as you live your life with love and faith to everyone that you meet then you are true child of God. There is no greater truth than God is Love. If you are sharing yourself with love with one or more people then you are committing no sin. Jesus would not condemn you for loving another person or persons. He would be pleased that you are sharing love.
I'm not as certain about purely casual sex but as long as it is shared with no malice then I am pretty sure that would not be frowned upon. There are just too many fanatics and extremists who twist what was meant to be a guideline into black and white fact. But only the facts that fit whatever reality they exist in. Live you are life the way that you need to and find comfort in the love you share with others. Love and faith to you.
GWNN
GWNN