In recent years I have encountered an increasing number of forensic cases that involve paraphilic sexual interest in STD infection. I am aware of two groups so far - “bug chasers” (who seek to be infected voluntarily) and “gift givers” (who offer to pass on the infection), but there is yet another group of individuals who seek to infect unsuspecting sexual partners. Is there a name for this group (or this type of interest) and can you point to existing research?