I've learned that a lot of dudes think they're a sexual god based off of shit they've seen in porn, when really, they're a lousy lay. There may be basic concepts of things a person can do that are likely to be enjoyed, but the actual details vary wildly from person to person. Example: oral sex. It's not my personal cuppa tea. It's exceedingly unlikely I will orgasm from it, no matter how "amazing" a man thinks they are at it. Pressuring me to have an orgasm when I already know that kind of stimuli doesn't do it for me is the opposite of sexy, but it has been absurd the amount of men who thought they were some sex wizard and that pressure is sexy.
No, you don't get to shove my head down further onto your dick when I'm giving oral unless we've discussed it beforehand. No, you don't get to spit a blob of saliva onto my genitals. I have lube. It's in a convenient pump top bottle, even. If you even lightly slap my face without prior consent you're getting punched in the dick. Discussing/communicating likes and dislikes can be sexy. Consent is sexy.