Imagine if he rimmed all 100 clients as part of the "basic sex" you demand from them.
Some behaviors are way riskier than others. Fortunately now with PrEP BB is no longer an act of madness yet it exposes top and bottom to other treatable diseases that most of the times as pointed by @Unicorn have no symptoms.
is not only taking it but as pointed by @Benjamin_Nicholas in another thread sometimes young men forget to take the pill every day...