Some men are into a fetish called ABDL, which is short for adult baby diaper lovers. I have always found it a weird fetish and distasteful too. I know it’s not hurting anyone really, most keep it a secret since they know others will not look on it kindly or with understanding. For them to infantilize themselves and go back to this earlier carefree time, they feel it comforting in some way. A few that call for it realize most look down on it and wish to be made fun of for participating in it.
Some are mild and just want to talk about putting diapers on as they masturbate and rub themselves through the diaper. Others actually will wet themselves and require post use clean up/shower as they have peed themselves. Them I can handle even though I find it a turn off, but some go whole hog and um, “do it all” shall we say. I can’t imagine how messing yourself is in any way appealing, yet some do, it seems to even be a growing fetish.
I guess the stresses of everyday life have ones seeking out simpler times when demands were fewer, and to them wearing diapers allows them to do that, even just for a short while as it’s happening. Some are upset at their own desires and know it is unpleasant by most people’s thoughts and have even sought out professional help for it. The pros seem to tell them as long as it’s not taking over and disrupting their lives to just enjoy it as it’s really fairly harmless.