Seriously, how do male pornstars last this long?

It’s not Viagra since that’s for maintaining an erection. It’s not kegels since they have to do with ejaculation and not orgasm. It’s not taking breaks because I’ve seen scenes where the guy keeps going for ages without any cuts. It’s not experience because many male pornstars are 18 years old.

Is there a reason as to why the guy’s brain does not register that his lubed penis is being intensely stimulated by attractive women for such a long time? Most guys in real life can only last for 2-6 minutes of constant intercourse, and often less.