The reason is probolly because of the following factors;

A: Their just to darn busy.

B: Its tireing saveing people all day, how the heck are they saposto have enough energy to do the bad thang

In short: Their to tired to. :)

C: Those who ware full body suits have trouble with the equipment and are afraid of the identy risk.

D: Cant find someone to score with, sad but it happens.

E: Those whome are married, dont have understand other halfs and are in the dog house alot. I mean alot!

F: and lastly, It's to dangerous. example: Cumming Superman and his SuperSpeeding "little supermen".

One word boys, Ouch. :)