{Sey} probably *can* be used in a sexual context where the English "excited/exciting" might be used, but that's really just the normal meaning of the word applied to that context, and I don't see how it can be a source of confusion in general.
In Finnish the word doesn't have any sexual connotations and there is a separate word that has only sexual connotations. I don't see how it can be "applied to sex".
I don't know Finnish, but surely there are words which apply both to sex and to other situations? Tempting? Invigorating? Aggressive? Forbidden? And with those words, surely you would just use context to understand the meaning. Even if Finnish has clearly distinct words for "be in a heightened state of emotion outside of a sexual context" and "be in a heightened state of emotion in a sexual context", I don't believe that no words exist in the entire language which can be used both in and outside of such a context.
If you read, "B'Elanna lunged aggressively at Tom Paris", you'd understand the meaning depending on whether it's a fight scene or a sex scene. Substitute "aggressive" for another word if that doesn't work, either.
I was reading nuq bop bom and it has several sexual scenes. How do I know if Sey refers to just general excitement or sexual excitement?
You just said it has several sexual scenes. I haven't read the book, but presumably if {Sey} is used in such a scene, it refers to the heightening of sexual feelings.
I understand people want to talk about sexual things in Klingon, but I'd feel more comfortable when I know that a scene is supposed to have sexual tones and when it isn't. For example, when someone is excited when meeting someone, does that mean that they are happy because they meet them or because they have sexual feelings form them? I don't think it should be ambiguous.
Again, I don't see how this can be confusing. If a scene does not have sexual tones already, and someone is excited to meet someone, then that excitement isn't sexual. It's not ambiguous. Actually, I don't even think the expression "excited to meet someone" can (normally) refer to sexual excitement (unless the writer made it explicit that's what they meant as a kind of wordplay on the word "excited" or something).