Thanks for the query.
As you mentioned you have taken treatment,
Also the lesion were dry,
There is nothing to worry,
The chance of herpes
getting transmitted to genital area is low.
Although it will be good if he also takes a course of anti viral treatment.
Please meet a dermatologist
and discuss regarding this.
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.
Wishing you a good health.