Verbally Abusive Patients!

As a RN who happens to be male, I sometimes get very discouraged with the public's image of male nurses. I work in a crazy busy ER with alot of, well lets be honest, scum and addicts come in for free shelter, food, drugs, etc. I seem to get the pts. who are rude and constantly degrade me. I had one such charmer last night. Every other sentence out of his mouth was, "Why are you a nurse? I want a female nurse. I dont want no *** touching me!". Another one of his diddies was, "You're too stupid to be a doctor, I dont want your hands on me." I know I should realize what is going on and just let it slide off, but sometimes I get so angry . It made me wanna give him a less-than-gentle catheter. How do you guys deal with offensive patients like this?