Something that’s always interested me.

Most of us will have applied various ointments to various parts of our bodies at various times in our lives. The applying is fine, and we expect the ointment to do the trick because it’s been applied to the unhealthy area. But what about the ointment that we have on the hand that isn’t unhealthy, the one that's done the applying? Okay we may wash it off, but for a short time at least, that ointment presumably is going to work on a hand or finger that’s already okay. Isn’t it a bit scary thinking about what it might be doing? Might that finger or hand be even more healthy than normal?