Specific folder for it , divided in Main, Secondary, Completed Games where I keep Picture + Save Game in the folder. All that is being tracked in a Excel spreadsheet with Names, Release Dates, Versions, Played etc. On top of that, there's a To Play List. If I'm not interested in a game I Ignore...
I think it's a good idea, a lot of games tend to have all the girls clean shaved, so hairy tag can go for any kind of hair. People can always ask in the threads of said game, what's the amount of hairy and if it's just one girl or multiple, avoidable or not.
There's plenty of them since they hit different kinks, but overall I have to go with Where the Heart Is. It's one of the longest playing games that I return to with every single update, so I have to go with that one.
Leisure Suit Larry, Lola 3D, Charlie Pays the Rent (Flash) and there was a Sims-like game with sex in it, if I remember correctly, but I do not know what it was called.
As for first adult game I played in this sense, could be something like Visiting Aunt Sara, Dreams of Desire, Man of the...
One of the favorites, it's the rough sex scene in City of Broken Dreamers with the blonde news reporter. Ruined make up, slapping, rough sex, deepthroat, almost a perfect scene. There's probably others, but that was the first one that came to mind.