I always wondered if this commonly quoted fact is the wrong way of causation. Men who are more healthy are more likely to seek more love sounds more logical.
It also seems that men who have a lot of sex have a lot of STDs. I would like to see the statistics
Sex is not necessary for health. That's weird. This is just an ingrained behavior to ensure reproduction via neurotransmitter feedback (dopamine).
One should be able to trivially control that consciously, no big deal.