Romance
Romance is a part of storytelling and the extent people express it is a matter of personal comfort. Romance in general requires a clear expression of intent and consent from all parties. 'No' means 'No, and don't ask again'. Sexually explicit or highly suggestive roleplay should be confined to private rooms.
Explicit depictions of sexual activity involving characters OR PLAYERS under the age of 18 is absolutely prohibited. No exceptions. Transmission of obscene or explicit material to a minor may be a violation of Federal Code 18 USC 1470 as well as your state laws. Noncompliance will result in a permanent ban.