Yeah, I couldn't help reading this and feeling extremely sad for Ryan. If they're in their 50's-60's, the parents had tried to get him diagnosed as a kid in what, the 70's?!? I'm not sure what they're expectations are for people with a mental disorder, but it sounds like they're expecting a trope and someone halfway functional is completely fine.

There is apparently a childhood full of sexual deviancy, which was never properly addressed and caused more anxiety and strain on his relationships his entire adult life. Dude's stealing post-it notes and anything/everything regardless of value, that's kleptomania 101

Kleptomania (klep-toe-MAY-nee-uh) is a mental health disorder that involves repeatedly being unable to resist urges to steal items that you generally don't really need. Often the items stolen have little value and you could afford to buy them. Kleptomania is rare but can be a serious condition. It can cause much emotional pain to you and your loved ones — and even legal problems — if not treated.

Kleptomania is a type of impulse control disorder — a disorder that involves problems with emotional or behavioral self-control. If you have an impulse control disorder, you have difficulty resisting the temptation or powerful urge to perform an act that's excessive or harmful to you or someone else. (link)

He's doing these things, but I think the expectation is that he should "just stop" or "get over it". He's so out of control he can't even stop him self while in front of other people or performing dangerous sexual acts, this is a person who has been untreated and needed help for decades.