No. IMO, it makes little difference to the BJ, and might be a slight negative effect, but it is a big negative to kissing. But I am just a grumpy old git complaining about modern youth, so the usual rule applies that you won't know until you try for yourself.
I would add that there are plenty of SPs with pierced tongues out there, and you will naturally come across (fnarr, fnarr) a few in your punting adventures; no need to track one down.