I hope I don't "biased". I've been a member of sites like this for over a decade, and,. while I have certainly had PM's I've sent ignored at times, I never sent one like the one you mentioned.

Personally, I think the person you mentioned is far too forward. I prefer to get to know someone, their interests, and how they got into the lifestyle.. know them as a person first.. before engaging in such sexual conversation.

That having been said, what you do is personal choice. At the least: I would request that the person who sent you that, get to know you as a person first.

Just my opinion. Good Luck with whatever you decide.