Touching , licking are all forms of sex and are considered medically as bare and if they are fresh all the more reason for her not to want them manipulated in any form.
Maybe carry latex gloves, maybe that would work . I’m not being funny. Here in Japan implants are not common, but when a lady has them they usually have latex gloves for the man If they were recently done.
Many germs and diseases including herpes that are contagious through the hand .