Blackie563 wrote:

.....Btw, I agree, I do think bi people exist, but lets not pretend this is equivalent to the round earth, not even close my friend.....

LOL 'thumbs-up'

E
 

In terms of a resource that was primarily intended as a safe space for straight people to find answers and support for issues directly associated with trust, deception and some form of understanding as what and why their lives have been upended, context is key. 
It is not phobic or hateful to assert that being straight is predominantly normal in terms of human sexual orientation. It is a biological necessity after all, as to this date, no man or woman has succeeded in being impregnated or been impregnated by a same sex partner. This is due to the forces of evolutionary biology, and has nothing to do with social acceptance or a desire for widespread inclusivity. In the world of the straight partner, the revelation that their chosen partner is bisexual is not experienced and felt as being anything other than the information that the disclosing partner is gay or homosexual to a certain degree. The straight aspect of a bisexual identity is irrelevant to them. That part of the sexual identity was a given. 
What modern society has forgotten is that all of the traditions and generally accepted rules about partnering with someone were there to allow for the safe and secure raising of children within the confines of a straight relationship where both masculine and feminine traits and energies would work together to provide for a balanced upbringing. The revelation after the fact that your partner is gay on some level will be felt to be destabilising to a degree. it represents a risk that there could be abandonment of the existing relationship and potentially a family at some point for the allure or temptation of a same sex relationship. This risk is of course present in a heterosexual relationship, where there is a chance that our partner finds a better option than any of us. 
The truth is that over the years  a great many of those who have used this resource for guidance and support have found that the bisexual revelation was a stopover on the journey to gay town. In many cases, this was not a deliberate ploy, or a tactic employed by the future gay partner. It provides an amount of plausible deniability for both themselves and others. Do bisexual people exist? Of course they do. But, most will be aware of their bisexuality. If they are not aware of it and find that they are in a heterosexual relationship. I can understand why they would seek to hide it, particularly if the heterosexual relationship is important to them and has high value. Does it make a bisexual partner untrustworthy? No, untrustworthy is not synonymous with any orientation over another. What it is, and it cannot be denied, is a risk multiplier. For some people, that risk is higher than others.
It does seem that the user who started this thread and voiced their concerns about their partner identifying as bisexual has suffered ultimately at the hands of the bisexual lie in this instance. My thoughts are with him as he comes to terms with what has happened. We all view life through our own prism, shaped as often as not by our own experiences. We make the best of the situations we face, and all are as individual as we are. If David was to find a new partner who after a period of time divulged that she was bisexual, would he be judged for experiencing a traumatic response to that? Would he be wrong or homophobic? No, he would be a living breathing human being who deserves understanding and support. He certainly does not deserve to have his thread used as a crusade for one truth above another.
Remenber this: There are three sides to every story. Your’s, mine and the truth. The truth is always somewhere between the two of us. In terms of a straight partners experience, the truth is a blade that cuts the same. Whether dealt with a grimace or a loving smile. It cuts the same. The blade and it’s wound was the truth.
I am truly sorry to hear what has happened to you David. It is something that none of us were prepared to face in our lives. But this is your safe place, among those who know and understand your pain and confusion. To be in this situation where we did nothing wrong, or anything to invite this trauma is difficult to take. I would advise you to be highly cautious in your dealings with your wife. Frequently, they become heavily influenced by peer groups who have scant regard for the damage that befalls husbands in this situation. They can become very quickly hostile and vindictive while being encouraged to take all they can with them into their new life. Fortunately, the law is objective where their own views are highly subjective. You will find a lot of lived experience and advice here amongst the chatter and clamour for righteousness that serves no purpose other than selfish aggrandisement.

Tabor wrote:

Claiming that bisexuality is not a legitimate orientation is offensive to bisexual people and those who care about them.

Again the aggressive stance towards me.  I am in no way claiming bisexuality isn't real.  Nor am I demonising it.  Nor am I calling them out on the bi now gay later, I don't think they can change who they are any more than I can.  

I recognise it is not the norm for me to make this distinction but when you call it an orientation then I think that's a misuse of the word - a compass only points in one direction. 

I don't think that changes the validity of identifying as being bisexual.  I agree with what ordinary guy said re marital compatibility with a straight.  and also glad he pointed out this is David's thread we are hijacking.  But still I'd like you to reply to my question - what do you think - is bisexual compatible with straight in a marriage?

The thing that bothers me is the thought of that young straight woman who marries a bisexual knowing that he is but not realising how different it is.