Doctors or maybe just Medical Students

Anybody who has lived near or gone to school at a university with a medical school ever notice that the young docs like to walk around in their scrubs a lot (and sometimes white doctor coats)? Is this to advertise to everybody, "Hey I'm a doctor, or at least a future doctor"? I wonder if the guys do it more often than the ladies...Probably, guys are always scheming to get some action. Anyway I have noticed this trend lately. And I'm not just talking about people walking home in their scrubs right near the hospital. I'm talking about people eating out at restaurants, working out at the gym, etc. Is this just a mating call or a not so subtle boast of life status, or am I just crazy? Probably the latter....