At first, a man who has been castrated will still have a ****** urge. Over time, however, because he's no longer producing testosterone, he'll lose much of his libido or ****** desire. Medications can readjust the chemicals in his blood and bring back some ****** desire. Studies have also been done that show with increased stimulation, a castrated man can actually get an erection, have ***, and orgasm (although he won't have any sperm in his ejaculate, which would be minimal in volume).
http://www.goaskalice.columbia.edu/2096.html:laugh: