dog = pet
cock = dinner
big difference.
our legal system is bunk anyways. You can't judge the relative severity of crimes by the relative severity of their punishment. For instance compare
http://leg1.state.va.us/cgi-bin/legp504.exe?000+cod+18.2-311
with
http://leg1.state.va.us/cgi-bin/legp504.exe?000+cod+18.2-308
Both cover possession of concealed weapons, under the first if you are caught with a blackjack, you get convicted of a class 4 misdemeanor, the second busts you with a class 1. So how does the cop feel the day he writes you up?
Just an example.