CrocoGator said:
Casual Japanese can use intonation to turn a statement into a question like English.

Kimochi ii! = It feels good!
Kimochi ii? = Does it feel good?

Especially with the latter though, you might expect to see one of many variants based on nuance: Kimochi ii? Kimochi ii no? Kimochi ii darou? Kimochi ii desu ka? Kimochi ii ka? Kimochi ii nda na? Kimochi ii ne? Kimochi ii yo ne? Kimochi ii kana? etc. "Kimochi ii?" is fairly common though.

Yeah, the former does indeed sound like what many are puzzled by when used in any form of japanese pornagraphy. 🤔