I accept, that English is not my first language so I might use certain terms with not accurate meaning. But what is the source of desire if not chemical reaction in your body responding to an outside stimuli with previous positive association with that stimuli?
Whether it's hormones or something else you would know better.
That said, her chemical reaction is just the initial response that has nothing to do with her conscious decision-making. She can resist her desire and act "sober", or she can go with the flow and seek immediate satisfaction.
It doesn't remove agency. It's just another factor that affects your decision-making. The choice that would normally be very easy for you (without temptations), suddenly becomes quite hard because you need to have great willpower to override your biology and resist said temptations to act according to your morals. Some people's morals or willpower are so strong that any desire immediately becomes a non-factor, but the opposite is also true for other people and any such decision turns into a struggle (porn addiction / hypersexuality). Everyone is still making a choice, but driven by different reasons.
Yes, I meant after the kiss because he kisses Lena anyway. You have a choice, to stop the kiss and push him away (that extraction you're talking about) or kissing him back which telegraphs your intention to proceed. Make up your mind on what you want from Lena. You want her to stop Axel or you want to make out with him knowing full well where it would lead? Your actions determine Lena's choice. If you choose to kiss him back, then it means Lena enjoys Axel's attention and wants more.
It's basically the same choice that was with Holly for Ian. You can either stop the kiss and tell her why you don't want to proceed, or you can respond to the kiss and end up having sex with her.
I get what you mean, I know you didn't mean it in the worst way. It's just what you said is a dangerous rationale that we must not let be perpetuated. It's an argument that is usually associated with "if she came, it wasn't rape", and it's usually used as an attempt to remove agency and blame from peoples actions. I know you meant neither of these things, I'm just saying it was language that we must be careful with.
I'm sure you can say for your own experience in real life, it's never your chemicals that decide what you do. Women aren't different in that regard.
When you really like a girl and you already have a girlfriend, it's not your chemicals that makes the decision to cheat on her or not. It's your willpower and something usually called "irrational rationality", a type of thinking and logical processing that occurs so fast that we don't even associate it with thinking.
It happens all the time. Things we think about in the past, our past experiences and our "brain molding" creates a sort of "algorithm", if you will (not really that, but the term is pretty close). If in the past you had modelled your brain to accept cheating, if you had already modelled this event in your mind and imagined it, you might make a decision that was entirely yours but "irrational" in the moment. You might go for a kiss in a situation you shouldn't.
It doesn't mean you are blameless and your "body made you do it". It was all your head, your logic, your thoughts that made the decision, you just made it long before the situation ever occured.
All this to say: even if the subslave Lena route is hot, I'm pretty sure hate and a new love interest would have overwritten her attraction to Axel. Besides: she already has scenes with Ian where she can be very submissive and he can be pretty dominante with her and with other characters, she doesn't need Axel for anything.
It cannot be denied that genetic determinism plays a significant role. Not in decision making, but in predispositions and the ceiling of the development of possibilities. "A man can do anything" is nothing more than a pleasant phrase from entertainers.
Genetic determinism is different, I wasn't really addressing that aspect. I was more talking about "my body made me do it", so we both agree with each other since you also say it doesn't affect decision making.
The brain is really weird and there are a lot of stuff circling around that has no empyrical data behind it.