>>5428220They fuck daily, reduces the sensitivity to sex, basically like jacking off multiple times a day.
Plus it's just a job to them, the mental aspect has a lot to do with it as well. Watch that Louis Theroux documentary about male porn stars sometime, there's another one too called Life After Porn and the male stars always say the same thing: it's just a job. They do get aroused sometimes but in the long run, the fucking pays the bills and not much else going on.