When I was younger, I wanted sex all the time. But around the time I turned 29 or 30 I rapidly began to lose interest in sex. It was like someone turned off a switch.
It doesn't seem normal - I should want sex more than I do. I'm healthy and my hormone levels are normal. Maybe I'm an outlier, but I wonder how many people aren't having sex because, for whatever reason, they're losing interest at a relatively young age.