It is impossible to consistently apply a policy as subjective as sexual/mature content. Way bigger platforms than them have tried and routinely fail at it. You

It is impossible to consistently apply a policy as subjective as sexual/mature content. Way bigger platforms than them have tried and routinely fail at it. You can keep trying to define what is or isn't acceptable, and people will keep coming up with more ambiguous content. The best anyone can do in this situation is look at user reports and make a judgement call.