So I guess this one will be used like in 80% of the works with sex scenes. Kinda irrelevant if you ask me. What's next? explicit consent? Where the characters sign a document (maybe even with witnesses) where they agree to have sex?
I know I'm being an as*hole here and I don't wanna get banned, just saying that even when there's no explicit consent, the characters are enjoying the experience and are agreeing to continue, otherwise they could just say no, and if the other(s) character continue with the lewd act, then yes, I agree with the rape tag being used.
Once again, I'm talking about fictional works and not real life rules ok?
My two cents.

late af for this but i think this tag is a pretty decent addition for people who might find it uncomfortable. at least you're self aware about how you're acting tho