My penis is shaped odd too. For solace I turn to the immortal words of Mr. Rogers:
Little boys are fancy on the outside
Little girls are fancy on the inside
Every body's fancy
Every body's fine
Your body's fancy
And so is mine
Masturbation is not why your dick is shaped that way. It is largely genetic. How we manipulate our members can have influence over time, but it usually small and gradual change.
Unless you have been putting in a concerted effort your masturbation habits have little, if anything, to do with your shape.
Pumps do, slowly, change the shape over time. Low pressure with heat is good. Can also aid in your size increase goals.
I’d stick with the newbie routine and do a lot of reading here before attempting the advanced exercises or use of equipment, though.
Before: I'd like to show you something I'm very proud of, but you'll have to move real close.
After: I\'d like to show you something I\'m very proud of, but you guys in the front row will have to stand back.
God gave men both a penis and a brain, but unfortunately not enough blood supply to run both at the same time. - Robin Williams (: