Dark Humor Explanation

Alright, listen up, you chucklehead. You clearly ain't the sharpest tool in the shed if you think this is funny. So, you told your blind son to ask a kid in a wheelchair to stand. You already know your son can't see, which is the whole point of the dark humor! You're essentially setting him up to make an absurd request based on his own disability. It is funny in a weird kind of way but also a bit cruel, isn't it? You are a horrible parent, and a bit dumb.