Edited*
There are a whole lot of necessary elements for a pregnancy to occur. Just like with a car engine. Needs to have a central chamber, pistons, spark plugs, etc. Lots and lots of bits need to be there, all doing their part. That said... without gasoline, the engine cannot work. The gas is the catalyst injected into a system that makes it happen. If other parts of the system are lacking, sure, the engine won't work either. But the gas is still the catalyst.
And just like someone has to exert agency to put the gas in the tank to make the engine work... the sperm-injector is a voluntary actor that has complete control over whether the sperm gets inside or not.
A woman can say "No, I don't want to have sex.". She can say "No, I won't have sex without a condom" or "No, you cannot cum inside me". But at the end of the day, the woman cannot actually control whether or not the sperm gets there. No more so than the engine can reject the gasoline.
You know that when women gas up their cars they put the nozzle in the gas tank themselves and pump the gas themselves, yeah?
Sometimes women are so horny they do the same with men’s cocks. Grab the cock, put it in the vagina and start pumping, consequences be damned.
Sure. But unlike the gas nozzle, the man can say no and take his cock out! What an amazing concept! It's magic!
So, regardless of our conflicts, I will grant that the vast majority of people affected by testosterone have an active compartmentalization that is selected for, and driven/powered by the parts of the brain that get so potentiated by that chemical.
In some ways I wonder if this isn't the primary indicator, really, of whether someone attempts transition of some sort away from Testosterone, namely the visibility of the compartment.
All I knew is that a new song I didn't like started being sung in the network of my neurons, and I know explicitly when it started, I heard... Most of the words of the tune, and I didn't like them.
Principally, for 30 years, I have had this song playing in my head and all I wanted to do was to shut it off.
Most people are "deaf" to it, even if they step to it's beat.
But I'm not sure if every "man" can just take his cock out. There's something in there conflicting with that directive saying "oh no you don't, you're gonna jizz in there". Honestly even knowing it's there doesn't always help.
Every testostronaut has slightly different experiences here, but most certainly there's something hidden to most, just beneath the ignorance of the surface layer.