Question: WHY are there gay guys who pretend they are straight???? Or go for women??

No, i'm soooooooooo not being homophobic, sexist, bigoted, judgmental, none of that......
Also to be VERY clear, the particulars (and people) that I have in mind are SO not in the category of can't tell their family, can't come out, it will ruin their life or career, none of the common reasons that people don't come out.
I'm referring to people who everyone would be ENTIRELY cool w/them coming out, be supportive, wonderful (and probably not too surprised to be honest).
So why do that? Why hide it or pretend to be otherwise? I'm also not talking about people in their teens, 20's, etc. who are still confused, undecided, fighting the feelings (though fighting the feelings could apply), I'm talking about people OVER 30 who know damn well who they are and what they like and prefer. WHY NOT just come out? OR if they're not wanting to come out, then at the very least, do NOT pursue women (or men) and be very misleading and dishonest w/significant others and even themselves.
Oh and don't even get my started on the bi-sexual deal. In my mind (and maybe it is too judgmental, too ready to label, though i don't think so, i think i'm VERY compassionate, very empathetic and very understanding, but I also believe what i believe and have strong opinions about many things, so i'm just being true to myself as well right?), i was saying in my mind bi-sexual is gay. Simple as that.
I'm not referring to women fooling around w/their girlfriends on drunken nights or even non drunken nights plus people tend to look at that differently right? gay women are "hot" and considered a turn on, blah blah. i'm generalizing, but you get it. okay i'm signing off, too tired to finish this up.
guess i'll come back to this later. i was typing this MONTHS ago & forgot i even had the draft, and other drafts. oops.