I was under the longstanding impression that skin stretching doesn't matter so much with a DE. Yesterday I just didn't have time for a straight so I used my Merkur with Derby blade. While shaving I stretched the skin just like I do with a straight razor and didn't use any pressure. I was surprised how quick, comfortable, and easy the shave was. The skin stretching just let the razor qlide over my skin. Without stretching I always had to use a bit of pressure I think.

Michael