masturbation is considered normal and a positive way to relieve sexual tension, open discussions on sexual matters can be had by people of any age, etc.
If you think that the USA already had this to a degree by that time then list ways that it could have been more the norm. I'll allow pre-1900 PODs if its seen as necessary.
Masturbation was already pretty much normal and accepted by the '90s IOTL I'd say. Not exactly something you can do in public- as the guy that made the Kony movie found out in San Diego but not seen as a bad thing in private.
What do you mean by "open discussions on sexual matters can be had by people of any age" btw?