Shampoo for bald guys

So I was in the grocery store the other day and walking down the shampoo isle and there's this bald dude picking out shampoo.  I wanted to say, Dude,..you're bald, you don't need shampoo don't waste your money..   But then I thought, this is a pretty big dude, I'd better not say anything, and who knows, maybe you still need shampoo even if you are bald.  It's not like I have a lot of hair these days and I still need shampoo..  But maybe there's a business opportunity here..?  Shampoo for bald guys..