Sex is a favored way to make babies.
There is some interplay between reproduction, repair, and longetivity. In fact, worms live much longer when food is scarce and they put a hold on reproducing. And typically, what applies to worms applies equally well to humans. The book "Lights Out: Sleep Sugar and Survival" briefly discusses the hormones involved in some of this.
Arguing against sex is frowned upon. If a teenager Asks Alice about ejaculation frequency, she will always reply "Good for you! No go and masturbate as much as you can!" But really, we have many more stimuli for sex now adays (more people around, the birth of internet porn, etc) and birth control enables us to have sex with our partners all the time, all year round.
So...any insight here? Humans want to procreate, and procreation is intricately tied with hormones that regulate lifespan. I'm not asking Alice, because she'll just want me to ejaculate as much as possible. I'm also not looking for sex advice--no theoretical musings will limit how much sex I want to have. I'm just wondering if anyone has seen evidence on sex and longetivity that doesn't list those foofoo advantages from stress reduction and stuff. Yeah, people who have enough sex live longer, but the confounders are too...confounding. Science please.
Note: I'm also considering the possibility that we don't have ENOUGH sex now adays, on average. Low libidos for varying reasons, inability to find a partner, or whatever.