Herpes isn't likely to be white bumps. Herpes is usually blisters or cuts that looks like paper cuts.
White bumps can be a huge number of different things, from normal skin variations, Fordyce spots (which are just oil glands), genital warts/HPV, etc.
At the bottom of his penis head, it's probably pearly penile papules. These are totally normal. https://en.wikipedia.org/wiki/Hirsuties_coronae_glandis - yes, it's a wiki article, but the photo is good. (Don't open at work or anything.) Some men have a lot, others have fewer.
If it's papules, you have no risk- those are just part of his skin.
Did you ask him about it?