There is a type of herpes virus linked with anal cancer, it is NOT a herpes simplex species, but herpes nonetheless (HSV vs HHV). This is not a "common
" type of virus, and only people in specialized fields are aware of it. I wouldn't worry much except to say that for this particular HHV to cause havoc you need to be extremely immunodepressed. In the meantime was be wary of the HPV virus, a much more common