"To see ​someone as an object, not a human" only exists in rare cases. Psychopaths, sociopaths, perhaps hardcore narcissists fail to see the humanity of others. Most people don't.

If you are a normal, functional adult, you can't "unsee" another person's humanity. That doesn't work. S​oldiers eager to fight for their homeland get freakin traumatized seeing their enemies tortured.

So yea, seeing women as sexually arousing and even wanting to touch their bodies is just that. Men can be assholes about it, but anyone can be an asshole about anything, and assholery tends to happen through friction. That's all there is to it.

It's not "​dehumanizing" to be into women, period. Even if you just want to fuck her and not much else. Even if you pay money for it. Full stop. Not seeing someone as human has clear, clinical definitions, it's a rare psychological condition that you can't just throw around whenever you feel uncomfortable.