Have you ever played a video game? That's rp, not all rp is about dirty stuff. Remember the choose your path books where you turn to a page based on a decision? Rp. I don't condone pervs but without rp, which has been around for thousands of years, we would have no great books, video games, movies or plays. Open you minds to the possibility that not every rper is a perv. Also, as a side note, rpers stop begging for higher, you have bad stats... most of the time.
Finally something to educate them thirsties about true Roleplay. Ive done professional Roleplay for years, all sexuality fades to black where we work, if it even comes up, which it rarely if ever does.