Can past lives determine sexual orientation?

[Miniar]

what do you think about the idea that transpeople were their target gender in another life and this is why they feel trans?

Nope. Don't think that is probable/possible.
A new body is a new life, new personality, new being altogether.
Just cause you were a woman in the past life and are a man in the current doesn't mean that your soul isn't congruent with your body. If reincarnation is a given, we can presume we've all been the other sex somewhere in a previous life, and yet, not "everyone" has trans-tendencies.

[Alyssa M.]

Leaving aside that I personally think reincarnation & past lives are a load of hairy old bollocks (with genuine apologies to Miniar), the hypothesis is unverifiable and just on that basis alone, fails the "so what?" test with me.

I'll pull a theory out of my arse to show how easy it is...

Every variation of sexual orientation and gender identity plays out in parallel universes.  The "you" that's reading this with your current orientation and identity just happens to be living in this one.  Tell you what, I'll throw in a universe where you're just a happy little nematode...for free!  I'm so generous sometimes...

Parallel universes are, of course, also hairy old bollocks and completely unverifiable -- basically, a maximally unparsimonious interpretation of QM with no experimental implications. I suppose that was your point?

[finewine]

Parallel universes are, of course, also hairy old bollocks and completely unverifiable -- basically, a maximally unparsimonious interpretation of QM with no experimental implications. I suppose that was your point?

Yes, exactly!

[tekla]

As the Firesign Theater would remind us:  Its hard to be in two places at once when you not anywhere at all.