Speaking from experience, if she tries to control you with your dick then you are going to eat shit later in the relationship.
I believe you. I guess I never experienced that from a girl. Maybe I curve anyone that selfish or manipulative. Or maybe they manage to manipulate me in ways that they didn't need to do it through sex.
You don't think perhaps sex with another person might not be just a little bit better than masturbation? Why on Earth did you start such a weird thread? Is your hand not cutting it? Leading you to philosophical meanderings on a fairly straightforward topic?
I do philosophical meanderings on a whole range of topics. And I like to cut to the fundamental of things.
For example, in fighting and self defense, people might say that on self defense against men, kicking in the balls is a good idea. It can be, as it's a way to kind of equalize the playing field against someone stronger. But fundamentally, it's strategically limited. It gives sharp pain, it can do permanent damage, but it's essentially a shock strategy. Against anyone that is used to dealing with pain, like someone with fighting experience, it's fairly useless, as even if you seriously damage the testicles it doesn't prevent someone from running or fighting.
In that sense poking the eyes is much more effective.
When you ask if I don't think it is more pleasurable, you're not engaging with the idea. It's easy to shove away any discussion about things that relate to sex, because people tend to have a lot of shame about the topic, which they can then try and shove away by trying to shame others on it.
I notice this because I used to discuss the topic of circumcision a lot when I had done a deep dive of research on it. That topic in particular lends itself to a whole range of easy jokes.
But to give a deeper answer to your question, I think Alduous Huxley was correct with brave new world and the series of interviews he gave about it, where he explained that there are situations where people are happy, but where perhaps they ought not be. Two topics to find easy agreement on the farms would be the euphoric feelings tranny's might have in the brief moment after surgery, or how people are happy on the current day centralised and censored internet. Two situations where people are happy and perhaps ought not be.
So I think about situations where people are happy with something, where perhaps their lives would be better if they engaged with it differently.
@wtfNeedSignUp gives one such example, where someone might be happy about the sex, but is letting it manipulate him into a miserable position, and
@Otterly another, how casual sex can be damaging for women. I'm sure the act itself was pleasurable for both of these.