Yes, there is an quite a bit of denial within the gay population about the existence of bisexuals. It's really quite understandable when you consider how many gay men call themselves bisexual when they are in that stage of transition from being the heterosexual they were expected to be to accepting the gay man that they were destined to become. Chances are if you meet a man under 35 who tells you he's bisexual he's either in that transitional period or a savvy hustler.
It gets even harder to believe in bisexuals when you chat online with men who claim to be. Most of them are grossly overweight underemployed basement dwellers with asthma who have a working definition of bisexuality as "I'm sexually attracted to any live or dead mammal that comments on my fake profile photo."
In my long life younger years I met five men for whom I have no doubts they were bisexual. Also from recognizing personality traits all five of them shared I have pretty keen "bidar." In the past 15 years I've met several younger bisexual men just by noticing the bisexual personality traits. All of them but one that I've met have been well about average intelligence, all rather quiet but not shy, more into intellectual discussions than banter. I'm sure there are true bisexual men who are unattractive but when I go out to meet men my eyes generally go to the ones I find attractive.
A man I will certify as bisexual is one I met 21 years ago when he was 26 and here for a six month internship from France, the nation of my my own birth. We became friends immediately in spite of the age difference. Sex of any sort was not discussed for at least 2 months, after he moved into the home I shared with my lover. He knew I was was gay when we met. He was very handsome and charming with no shortage of women chasing him. He was the one who initiated the conversation with us about American sexual mores and how they made it difficult for him as a bisexual. It was not long after that when he began coming to our bed, sometimes just to sleep between us, sometimes for sex, always very relaxed and uninhibited. After three years in France he moved back here and the sexual relations began again. My first partner died and this bisexual man is now 47, still very handsome and fit, still my favorite and most frequent guest and sex partner. He has no shortage of women in his life but does not feel inclined to marry.
Dr. Jim Hicks has taken the lead in redefining how people conceive of sexuality. Many younger medical professionals along with many in psychiatry and psychology have joined his effort.
If you know the model zero to six model of sexual preferences developed by Kinsey in the 1950s you can agree it's very simplistic if not too simplistic.
Dr. Hicks has developed a test to gauge each person's overall sexual potential but not on a two dimensional Kinseyesque chart but a hexagon to accommodate six factors that form sexual identity.
Take the test and report back on your results.https://flexuality.wordpress.com/2011/01/23/the-new-flexuality-test/