Is it weird to want to do a three some with your boyfriend and his best friend?

so im in a committed good relationship with my boyfriend and we have been together for a long time and one of his friend that I'm starting to become friends with is looking a bit more fine then normal, and I was thinking about normal sexual fantasy about my boyfriend and he came into play, I'm never going to act on it but what do you guys think?

Is it weird to want to do a three some with your boyfriend and his best friend?
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