This is punting related but perhaps best posted in OT i'm not totally sure so will put it here to be on the safe side
This is something i've thought about quite a bit over the years but Google searches hasn't been able to answer the question -
So basically if you obtain a cut or some other form of skin problem such as a mouth ulcer how long until it heals properly and can be considered to provide a barrier to infection

By barrier to infection i'm talking about a cut on your finger having healed and now safe to finger a girl and with a mouth ulcer healed and safe to kiss and give a girl oral
I'm not expecting one single timescale for everyone as different people heal at different rates and it can depend on the environment that the injury is in, for instance a finger cut may take longer to heal if it's covered by gloves required for work or gets wet / damp / dirty etc.
Likewise i've had mouth ulcers that seem to go away after 2 or 3 days whereas others can linger for 2 or 3 weeks
Anyway with a mouth ulcer i've historically waited until it appears to have 100% cleared up and then left it around a week before punting or i've avoided any kissing or oral on the girl but these are both important parts of a punt for me, sods law i've also been coming up to the week a few times and then felt the start of another one on the way

I am assuming that a mouth ulcer is a way in which something could be theoretically be caught and I believe that it's related to Herpes Simplex so not fair to the girl either to punt while you have one

Likewise with a cut finger a week would seem like a reasonable timescale from the point that it appears to be fully healed to punt again