The way TRP and so-called nice guys obsess over sex is socially motivated, not an innate need. Sex is nice to have but you won't die without it. The pain expressed from lack of sex is the pain due to not being socially validated as worthwhile, so in return they aim to devalue the people who they perceive as not valuing them which is why their subreddit is a frothing mess of rage and cold condescension directed at women.