A lot of my roleplays are 18+ simply because I cannot dictate where one might go. Most will include some degree of violence and harsh language, and I have no aversion to writing sexual content IF the roleplay approaches such a topic. But you will need to explicitly state that you would like to include that in a roleplay, otherwise I will assume that you would like to avoid it!
So don't be shy, say hi.
Inquiring minds want to know why we too should befriend Singer!
Did you remember to explain why your friend is awesome?