Knowledge of what feels good for you and your sexual partner.
Having the maturity to communicate with your sexual partner, asking questions, getting feed back on what feels good, and giving back in general.
For instance, knowing how to give the perfect blowjob takes these two things. Learning where it feels the best in general by reading books, and/or asking questions.
Knowing that a blowjob is not a blowjob unless the receiver cums! Otherwise, that’s called foreplay.