It's a fair question. I was as confused as you are and you're quite right, to openly ask such a 'gender-insensitive' question could land you in jail these days. I suffered great upheavals in my brain when the Snowflakes started with all this nonsense. I tried my best to understand and to keep up... but when I heard that in NYC alone there are more than thirty different genders - yes, you heard right:
30 - I thought fuck it, there's more to life than this shit.
I heard however, that in Canada (I think it was), you can now be persecuted if you address some made-up gender with the wrong pronoun. So out of curiosity, I looked at a list of those pronouns... the whole thing is ludicrous.
I refuse to be part of this insanity!
So to answer your question.
Tomasz used to be a little boy because that's how the good Lord created him. At some stage, and nobody knows exactly when that was, Tomasz became very sad.
Long story short, in the end Tomasz became a sodomite. But, when after a long time even sodomy didn't bring him any joy and that the 'gay' factor kept eluding him (he had naively thought that 'gay' means happy... silly boy) he decided to become a woman, a she, a female.
Now by what logic life as a woman would bring him more happiness than that as a sodomite, I haven't yet figured out. Maybe there is no answer.
So currently Tomasz is still in a gender transformation phase, a process that has already taken a long time
But rumours have emerged that Tomasz doesn't really want for the gender transfer to continue, as his current situation seems to suit him well in ALL walks of life. As a 'half this half that', his deck contains not only one, but two victim cards. It's almost like a superpower when you think of it.
You might also wonder, as some of us do, what planet some of the housemates come from. Lewis mentioned reptiles in the DR,,, so there is a good chance that he himself is a reptilian from the Delta Quadrant.
Any way, my research into this has only just begun but I seem to be making progress...
...watch this space