You make a really good point. I'd also say to
BasedDenier that, as you're new to adult games, you'll want to look out for games that are NTR (netorare) or NTRS (netorase) in addition to swinging, etc. Netorare = love interest gets stolen from MC, NTRS = love interest is shared with other men with the consent of the MC. If you are strongly averse to the girlfriend/wife being with others (and/or the MC being with other women), then if I were you I'd find what you are into and narrow your scope. Nothing wrong with liking vanilla stuff -- I enjoy many games in that lane, if you want recs, off the top of my head (games I've at least played SOME of): Eternum, Being a DIK, Harem Hotel, Out of Touch!, Lessons in Love, Echoes: Cards of Destiny, FreshWomen, Where it All Began. Hope that helps