Why do some straight men have sex with other men? It’s a subject that’s always fascinated people and a couple of researchers might finally have some answers for us.

Héctor Carrillo and Amanda Hoffman from Northwestern University, recently spoke to 100 men who identified as straight but sought out casual sex with men online, and they published their findings in the journal Sexualities.

Carrillo and Hoffman found that straight men who slept with other men believe that they are primarily attracted to women. In fact, they believe that they have no sexual attraction to men at all, as they define sexual attraction as a combination of physical and emotional attraction.

And when it comes to other men, they just want to have sex with them.

They're not into male bodies in the same way that they're drawn to female bodies. They're really only interested in the penis. They see penises as 'living dildos', disembodied objects of desire that provide a source of sexual pleasure.

All of this is why they see themselves as 'straight' even when they're sleeping with men. Privately they might think of themselves as bisexual but they see no social advantage to identifying as bi.

Most of the men in the study made it clear that they really, really liked women:

"I know what I like. I like pussy. I like women … the more the merrier … I would kiss a woman. ANYWHERE. I can barely hug a man … I do have a healthy sexual imagination and wonder about other things in the sexual realm I’ve never done … Sometimes I get naughty and explore … That’s how I see it," said Reggie a 28-year-old participant.

Sex with strangers, electronic cheating, and dating for the shy on Life Love.

"Women are hot … I can see a beautiful woman walk down the street and I instantly can become hard and get horny. I don’t think I’ve ever seen a guy walking by and got a boner. Also, I would not want to kiss or make out with them or love them. They would be more like a sexual experience," added Charlie, 32.