西方为什么会出现“追毒者”？ 第1页

Some bugchasers engage in the activity for the excitement and intimacy inherent in pursuing such a dangerous activity, but do not implicitly desire to contract HIV

这是图爽的（和HIV携带者搞会比较刺激，不希望因此感染）。

Some people consider bugchasing "intensely erotic" and the act of being infected as the "ultimate taboo, the most extreme sex act left."

这是觉得自己感染了HIV属于比较特色的

People who are HIV negative and in a relationship with someone who is HIV-positive may seek infection as a way to remain in the relationship

这是怕被感染了HIV的性伴侣给甩了的……

Others have suggested that some people who feel lonely desire the nurturing community and social services that support people with HIV/AIDS

这个……算是病态的孤独吧……

题主问的应该是头两类……

个人认为，归根到底是HIV现在可以通过终身服药得到一定程度的控制使得HIV并不像之前那么令人恐惧，以及现代福利体系和慈善行为的副作用 “更妙的是，医保（NHS）会替我承担全部费用。”