haha.. i have had exaxlty the same problem! its been 4 months now, since december, and i blowjob related injury.. (frenulum caught between front teeth.. OUCH!) it still hasnt healed though i can have sex most of the time without noticing it. though its clearly visible since a small part is missing.. i think it doesnt heal because the area isnt dry enough.. and it very very easy to tear again... this is after 10 years of un-complicated sex... :S