When practicing S / M as well as playing with toys and dildos, you have to be careful so that no sperm, blood, or body exudates get on mucous membranes and open spaces (e.g. urine and feces) to avoid infection with sexually transmitted infections (STIs) .
Hygiene should also be used when handling devices such as whips or restraints: these should be cleaned thoroughly before being used on another person or on yourself. Urine and feces are harmless in the transmission of HIV.
However, you can become infected with intestinal parasites and hepatitis, urine should not be swallowed. Those who offer such special practices should in any case get vaccinated against hepatitis.