Let me see if I have got the logic clear, which is that 'whatever people call themselves/how they feel' defines their sexual orientation, rather than biological sex:
So we can all agree that a man (male) and a woman (female) are a straight couple.
But gender logic would also say a woman (female) and a transman (female) could also be a straight* couple.
And a man (male) and a transwoman (male) could be a straight* couple too.
Would gender logic agree, though, that a transman (female) and a transwoman (male) are a straight couple?
Likewise, we all agree that a man (male) and a man (male) are a gay couple.
But gender logic asserts a man (male) and a transwoman (male) could also be a straight* couple.
And a transwoman (male) and a transwoman (male) are a lesbian couple, not a gay couple.
Additionally, we all agree that a woman (female) and a woman (female) are a lesbian couple.
But gender logic says a woman (female) and a transman (female) would be a straight* couple.
And a transman (female) and a transman (female) are a gay couple not a lesbian couple. While a transwoman (male) and a transwoman (male) are a lesbian couple, not a gay couple.
However, a woman (female) and a transwoman (male) are a lesbian couple not a straight* couple.
And a man (male) and a transman (female) are a gay couple not a straight* couple.
*where straight can also be synonymous with bisexual or pansexual, if that's how they identify.
With the proviso that it is the trans person who holds the casting vote on defining the nature of the orientation of the couple based on their identity.
Is that about right or have I missed something?
Oh yes, non binary people...