Do you think a lot men are gay out there just because they can’t a woman to sleep with them?

Nope.
And to be totally honest with you, you don't need to be attracted to your hand to fuck it or attracted to a dildo..or your finger...etc

So you aren't necessarily gay just because you had sex with the same gender.

Not sure what priests schools are?

Well probably aren't gay but the desire of being sexual with someone is too strong and end up doing it with other men

No, I don’t....if they wanted a woman to have sex with but settled for sex with a man, they would be bisexual at most and possibly still straight but were horny enough to do it with another man.

I don't know about that.
But there is very strong suggestion of bestiality when men used to go to war in very olden times.
So anything could be possible.

Desmond Morris suggested that back in the sixties in his anthropological book, The Naked Ape.

Women are just boring in bed 😏