It really depends on how sensitive and/or tender your skin is. Under the chin can be a very sensitive or tender area for some guys. In that case it's best to go with the grain, or as close to it, as is reasonably possible. Sometimes it's very hard to go exactly with the grain, so slightly across is ok. With sensitive skin on any part of the face, shaving with a straight razor directly against the grain, especially on the first pass, can cause problems with razor burn and small nicks and is best avoided.


Scott