Glad it made sense! Yes, I can see how that wouldn't work with everyone being straight. I am a straight female, my husband is bisexual, and my friend is homosexual, but him and I "click."
If things were to not work with M and we decided to find someone else, it would need to be a similar situation for me to feel okay. And being that comfortable with anyone is hard for me. I am very happy to be that comfortable with not only my husband, but with M. I can't imagine it being someone else at this point.