What you’ve touched on is so complex we could try to decipher it with 1000 posts here.
While I agree that the guys are trying to get laid, I disagree that they only want sex. IME they want sex and they want MORE sex, which leads to relationship, marriage, etc... I don’t see men as just wolves looking to use women. OC, there are some who are just players. Discerning the user from the relationship guy is a skill.
I’ve had experience where the guy has been instantly smitten and said I was so perfect. I ate it up. I believe they were being genuine. I never felt they used me. I was most likely the one who dumped them in the end.
The more I know of men, and I am in my 50’s now, I find they are ‘what you see is what you get’.
You are wondering why that date said you are perfect when he didn’t even know you. Was it his line to every date? Did he genuinely fall head over heels? Is there nothing more to love than physical attraction, especially for men?