I wouldn't drag most into "trash", but I would into "Too similar to other VNs", which doesn't always mean that they are bad, so yeah, different ideas.
The only VNs I know that don't railroad into sex (or at least let you avoid it) are Once In A Lifetime, Eternum (probably at least...) Mystic Manor. Maybe House In The Rift but been a while since I played it so maybe I am misremembering
Just to clarify again, we're also really speaking of alternatives, which could be bypassing a scene/route entirely
or providing an alternative sexual situation + also not referring to main love interest - as they're the main reason for playing - but side characters, unless the main LI has a weird side-fetish option not generally related to the game. Like "no, I'll opt out of that finger in my ass" is pretty typical unless the game is entitled "dominant ass-play buttsluts".
Would probably clarify things more to list the sort of games that don't have the option. It makes sense for certain types of games/settings but not for the choose-your-own-adventure sorts of VNs I have in mind. ORS/GGGB, Healslut, Tabletop Bornstar, Long Story Short, Summertime Saga, Sexbot, Nothing is Forever, Dr Amana, all examples of VN style games where specific scenarios aren't railroaded or at least provide alternatives. As an aside, I'd consider something like What A Legend to be more of a point-&-click adventure puzzle game concept rather than a choose-your-own-adventure style VN. Traditionally attractive characters in less niche situations also, which would facilitate less desire/need for alternative options. Though even it had alternate options for some if I can recall. (It's been a while).