What is Natasha K's affliction? What is its cause? How does it affect her? Does she like it or dislike it?

Natash K has Cupid's disease, which is caused by the syphillis she acquired working as a prostitute when she was young. Syphillis produces spirochetes which infest her blood and attack her brain. The resulting disease, Cupid's disease, gives her a sense of well-being and flirtatiousness. She very much enjoys it.