"This lump has been growing over the years and is rather large now. It seems like everything I am reading leads me to believe that it nothing to be concerned about. However, it seems odd that other men I know don't have to put up with these oddities. Thank you for your time."
Dude, I don't wanna offend you, but are you crazy ??
You have a growing testicular lump for years and don't go to a doctor ? If I discovered a lump today, I'd go to a doctor tomorrow. I mean this is something you don't wait and see what happens. It can be anything, however since you've been having this for years I don't think it's cancer cause if it was cancer you were most likely dead now. Nevertheless you have to go to a doc !