Masturbation is usually sex with someone who cares.
Foreplay
IS sex. And sex is the one endeavor where only a fool races to the finish line.
Being "good in bed" can be learned. Everyone can learn it. Unlike basketball, it doesn't require high levels of agility and dexterity. Everybody should read a book like "
The Joy of Sex." I mail-ordered it as a teenager (nobody was going to sell it to me over the counter back then) because It was a skill I wanted to be good at.
If one considers premature ejaculation a "problem," there are ways to solve the "problem." One needs to see it as something to be worked on and not just lived with. Too many men take the attitude that it's not their problem, while others think of it as a permanent disability.
Human females have concealed ovulation. That means she has to have a lot of sex to make sure she gets pregnant. Female orgasms also enhance the likelihood of pregnancy. The point of it all is to form strong bonds. Humans are meant to have lots of sex, and women are supposed to have lots of orgasms. The mate who tries to please her will probably stick around to be a caring father.
One needs to abandon the notion of sex as dirty. Or that the objective of sex is just male orgasm. Instead, approach sex as a form of mutually pleasurable play. You'll see it becomes as much (or even more!) about the trip as the destination.
And that's why good sex can last for hours. The real problem is that men are in a hurry and don't consider their partner's needs.
Civilization has imparted all kinds of bizarre notions about sexuality into our heads. Shoulds and shouldn'ts and musts and mustn'ts. And broadcast made-up, photoshopped, cherry-picked, and carefully scripted ideals nobody lives up to.