Okay so, when I was high school we were studying Maslov's Hierarchy, and as of recently I thought up my own interpretation.

Parents worldwide like to hit their children, so Maslov wrote that the youth and people in general seek sex first and safety second.

However, there is hope. Mr Rouynekov has proven that people seek relationships with the opposite gender, and work for money second, alongside food, water, bathing, and a ton of other things, so in reality, sex, is needed for the survival of population, in addition to retention of the person you have sex with and spend time with.