It depends, certain people do it and yeah it does hurt :L
but if you get the right person who do it the way you like, then it is nice, i like it
answer mine?
http://uk.answers.yahoo.com/question/index;_ylt=AkSxVZeXJNKM48aE7Nyt4JIgBgx.;_ylv=3?qid=20110723094346AAOwJHb