Hello Thanks for your query. Genital herpes is contracted only by sexual intercourse - oral, anal or vaginal. the likelihood of acquiring it by fingering is very remote - unless he had an open lesion on his finger and touched your private parts with those secretions. Very hypothetical indeed. You have acquired it from your current partner - that is the only explanation. however his being negative on bloodwork makes it even more complicated. The only thing for sure is - it is transmitted by sexual contact or oral mouth to mouth kissing. Take care.