My taboos/limits are:

I retain the right to set stricter limits depending on the level of trust in and/or previous playtime/experiences with you.

hard limits: everything that has to do with urine, faeces (except A2M, if I had the chance to clean myself thoroughly before), vomit, snot, spit, drugs or illicit substances of any kind, physical damage including "traces" like whip-marks (anything that remains visible for >4 hours), shaving above shoulder level, social...