I don't cut... persay. It's odd that I do like cutting myself, the sight of blood and all, but the worry of infection is what stops me not any kind of embarassment at the act itself. It's interesting seeing what happens when the skin parts, the whole process as the body begins to heal even as it is breached is fascinating.
But... the slow burning pain, the ache, swelling and redness of infection is no fun. :p Neither is putting peroxide on it to kill the bacteria invading the body. Even damaged tissue itself aches somewhat, and there is that nasty tendancy to form scars. Scars are no fun.
So yeah... sometimes I get desires to cut myself, mostly due to lack of stimulation in my life. (Nothing wakes you up more than a blade parting the upper epidermal layers!) I usually assuage it with writing, or inducing pain without breaking the skin. Like pinches and stuff, there are some places you can pinch that hurt like crazy! Quite satisfying and all.