Bob The Doctor

Bob saw his doctor and asked if he had ever laughed at a patient. "In over 20 years I haven't because I try to remain professional." With that Bob dropped his trousers revealing the tiniest dick the doctor had ever seen.  It wasn't any bigger than a AAA battery. The doctor burst into uncontrolable hysteria.  "I'm sorry I really am, I don't know what came over me, I promise it won't happen again.  Now what seems to be the problem?"  "It's swollen" said Bob.