Is it possible for a man to like anal sex but not be gay or bisexual

I have spoke to a few men that enjoy anal sex and things up their backside. They say they want anal sex and to be fucked up the ass but they are not gay. I think this is lies most straight men wouldn’t even let a finger up the bum so for a huge cock or dildo or whatever to be shoved up there they must have at least slight homosexual thoughts. Opinions??

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