I ordered some fresh NTSU yellow and decided to try dipping it without airing it out. It hurt like hell–the ammonia feels like it’s cutting your lip (which is probably why Copenhagen has a slight burn too). The nicotine was plentiful–more than I needed, really–but it comes at the price of burning the hell out of your mouth. I kept it in too long and ended up with sores in my mouth. I don’t think I’ll do that again. Long story short: not for everyone. For madmen (and madwomen) only.