When I hear the word dick, I think of a mean person. For guys who go by Dick, I think they want to be known to be mean and manly 
I think nicknames in general are falling out of fashion. Among youngish adults I seem to encounter plenty of Stephens and Davids, but rarely a Steve or a Dave.
Nope, completely serious.
I know a Richard that goes by Dick, what makes it extra special is that his last name is Dodick. I know him in a professional manner, so he has given me his business card on a few occasions. His email address is on the card:
I cannot for the life of me figure out why he would do this to himself. How many people have deleted email from him without opening it cause they thought it was porn? (I guess maybe other people open it for exactly that reason, though…maybe he knows what he’s doing after all 
My mom’s younger brother is called Dickie by his brothers and sisters. My mom couldn’t understand when we (my brothers and sisters) would giggle when she introduced us to “Uncle Dickie”. She said we had dirty minds. She was right.
Pussy Galore disagrees with you.
Well, yeah…but there is a sorta good explanation: Some people just know how to distinguish meanings.
for 'xample:
Have ya ever asked somebody across the dinner table to pass you a chicken breast?
Were you thinking of chicken, or of boobs?
Uhh…I wouldn’t touch that straight line with a 10-inch pole.
clears throat, picks up guitar
There were three young men who fell in love with Jane
Tom, Dick, and Harry were their names
“I am her only boyfriend!” each of them would boast
But she passed on Tom and Harry, 'cause she liked Dick the most
Now she’s got Dick in the palm of her hand
She likes to hold Dick, she likes to squeeze Dick
She likes to kiss Dick all of the time
Seems like Dick is always on her mind
(Pinkard & Bowden, The Ballad of Dick and Jane)
I was born in the 80s and went by Dick or Dickie until college. I didn’t choose it - it’s what my parents called me. Since my dad, grandpa, and great grandpa were all Richards that went by Dick I guess it was only natural that they called me the same. Somehow they didn’t get the memo that this was no longer OK. I have never in my life met someone else my age that was named Richard and went by Dick.
I tried in high school to start going by Richard, but everyone already knew me by Dick, so it didn’t really work. When I went to college, I was able to reinvent myself as Richard. Now most people call me Rich, Richie, or Richard - never Rick or Ricky. I still get called Dick by some high school friends and Dickie as a nickname on sports teams. I don’t really mind it anymore, but growing up it was… character building.
Meet NBC5 Chicago morning newscaster Dick Johnson. Seriously.
They once had one of those fluff pieces about fake names used to prank-order pizza delivery, and after the piece ended, he added that occasionally he’ll have issues with some disbelief when trying to order pizza, make a reservation, etc.
Anybody remember Dick Assman?