During my night adventure in AChat, I have noticed that there is demand for a few more actions, in cloth, not in sex mode.
Several times I have role played with girls and t-girls following situation:
First partner gets on his knees in front of standing other partner and rubs his face (nose, lips) over genitalia of standing partner, licks his\hers panties and so on. It's mostly for SUB and DOM play, but it was repeated very often, by many partners, so it must be in demand as sort of foreplay. ( slave showing his submission to Master\Mistress.)