Do you mean actual SPs? or the scammers on LL who say they have no restrictions?
Everyone has different tastes and we just have to respect each other's preferences. For some, as I've been told, DFK (along with other activities) feels too personal. If you enjoy giving/receiving golden showers, find yourself an SP who does that and hold on to her for dear life and just enjoy the ride. Life is too short to try to understand a woman