In the beginning, we were created by God in an ovoid white-fire-spirit-light, the soul was split just like the atom into two identical parts (twinflames / twinsouls) each with the same identical soul blueprint. We are created with a divine other, divine half, the other half of our soul. This other half of our soul is what we call �twinflame or twinsoul�. We only have one twinflame / twinsoul since the beginning of the creation of our soul. We may reincarnate a different person each lifetime, met different soulmates each lifetime but no matter what lifetime it is, there is only one twinflame.
So one soul �androgyne� (androgyne means no sexuality, not male, not female) was split into two. As they were separated they carry in them a predominantly male part as well as a predominantly female part. But each part still carries the essence of the other. So the predominantly female soul still carries some of the male essence and the predominantly male soul still carries some of the female essence. One example is me: I am a predominantly female person but I still have a little bit of the male essence in me. My twinsoul is a part of me, I have some of his male essence. My twinflame is a predominantly male person, I am a part of him, he also have a little bit of my female essence.
I am a predominantly female person. I had glimpses of my past life, the majority of my incarnations was female. But at other times I chose to be reincarnated to a male body. So we can reincarnate as a male person or a female person. And this is the explanation why there are homosexuals today. So for example, a gay male is actually a predominantly female soul who chose to reincarnate in a male physical body.
When we talk about heterosexual or homosexual relationships we focus on the gender of the physical body instead of the gender of the soul. At the level of the energies when twin souls meet, they will be drawn to each other no matter what gender they have. This means that sometimes the male and female halves of the same soul meet and both of them can be incarnated in women's bodies or in men's bodies.