Feelings about threesomes

Hello everyone. So a couple of weeks ago I've matched with a bisexual woman on Tinder. Just to clarify beforehand I putted in my bio that I'm straight (mainly because of prejudice against men). So... last nite we went out to a rooftop bar. Just chilling and drinking cocktails. Below us there was a pool party and there was a guy dancing with two women. We saw the scene and she asked "have you had a threesome?". I was a little bit confused with the question. Mainly because I felt a little bit uncomfortable watching the scene and she has more sexual experience than me (I'm a male older than her BTW). Anyway, we quickly changed the topic and kept drinking. Afterwards we went out to another bar to dance. I was blown away with the guys right there there was one with big legs and another one with a beautiful smile he had something that made me think he would be from Brazil. There was this moment when a lot of us just danced in circle (including the girl that I went with in the first place). In the middle of the music I kept thinking: "actually I would like a threesome. But not with another woman like straight guys usually dream about. I would like to feel the heat of man and a woman. All of us sharing a great time together". Usually my fantasies involve other kind of things. So I didn't think too much about that topic. However I won't lie saying that I don't feel curious about it. Specially after recalling movies like "Challenger" (If you have seen it you will know what I'm talking about). Considering how "uncommon" is to find a man who is into this kind of things I would like to know from your perspective... what do you think about a MFM threesome?