I don’t think that’s an effective way to transmit them, but I would get him vaccinated. Some doctors even think mouth kissing is not an effective way. It usually requires something like a minor cut and direct contact for them to establish themselves. I think I gave them access by shaving close to my lip the night I made my stupid mistake.
It suppose it is possible, but I don't know how likely. Maybe he can get vaccinated.
Also, what do your warts look like and how many? I have 2 tiny pinpoint circles on the bottom of my lip near my lip line but not on the lip line. It's smooth surface and flat, looks skin colored when left alone and whitish, greyish when I stretch the lip. The skin over it is like translucent and what's underneath looks white.
I fairly certain these are warts because I believe I got them around the time I made my dumb decisions.
The removal process would make my lip look worse than that the actual warts. I'm going to try duct tape and immune supplements for a while.