> Testosterone levels drop in men who even cohabitate with young children.
I call bullshit. There is at best a correlation of cohabitating with young children and periods of sexual inactivity, but probably correlation of periods of sexual inactivity and participating in the study you pulled that data from, i.e. it's a bullshit study.
I have no idea what other changes might occur but I wouldn’t be surprised if there were others.