So I was curious about that entry in wikipedia on his early life. The only citation for everything there is (p.35 Anderson, Captain John D. & Walker, Mort Mort Walker: Conversations Univ. Press of Mississippi, 28/01/2005)
But that page
as found in Google Books, contains absolutely none of that information.
I'm not somebody who has gotten into the whole maintaining Wikipedia articles thing, but that whole paragraph should be deleted since the citation bears no resemblance to what's on the cited page, although when you read the whole chapter that citation is from, it touches on a few of the things in that paragraph. But nothing about Mort's manhood.