Now on to the next bit of sewage that escaped from your god’s mouth 
and into your special ear 
and your brain 
placed meaning.
- personal opinion on why men or women chose the gender they want to be with is based on genetics. *
Your personal opinion is yours. HOWEVER the sex of a human is determined by the XY - but the “gender” is determined by the person themselves. Gender is an expression of who the person determines themselves to be.
- why did the God of the Israelites forbid same sex relations. Well I believe it is to do with procreating.*
The volcano god who has no evidence in reality for its existence? Before you stated it as “natural”. Interestingly enough - you may take a symbolic meaning (so you say now) but your homophobic views leaked in your posts, so your view translates into real world attitudes and views of fellow humans…
This god of yours (at least bible god) has MUCH to say on what’s natural - mostly found in the stories and the law you so kindly used above (because being a male or female human hinges on “your working parts”) - nonetheless ohhhhh let’s see what else is natural:
Incest
Owning another as property
Genocide
Abortion/infanticide
Multiple wives
Royalty
Social classes
Rape victims marrying their rapist
Animal & human sacrifice
The Urim and Thummim (coin toss decision making)
AND since you so kindly inferred Unnatural (to anything outside penis vagina intercourse) let’s again see what else is Unnatural that god forbids … scary 
Mixing of clothes (blended materials)
Boiling a baby goat in its mother’s milk
Picking up sticks on Saturday
Witches
Desire
Dead bodies
Clams, oysters, crabs, lobsters, and shrimp are abominations - sorry Red Lobster 
or BubbaGump
Women were unclean after childbirth too (but less “time” for a boy - twice as much for a girl…hmmmm those sex organs are important to god)
…and a shitload more - however I think I’ve made my point.
If this is unclear, or not honest enough for you, here, I’ll clarify now -
Take your bigoted buybull backed bullshit and shove it where the sun don’t shine.