Thankfully never experienced bad smelling kitty, but I do like it when it has a natural scent, not bad, but naturally musky, it's INSANELY arousing to me.
I once requested an SP not shower a couple days before our encounter, and she smelled amazing down there - natural feminine musk, but only stronger
Something I would never wish on someone encountering a smelly stinking twat. Oh it is GROSS. Encountered it once and the best way to describe this was like rotting fish and garbage out for a few days in 100 F degree heat.