What?
Do whatever you like with any item of clothing you wish. I don't care. I will neither laugh nor cry, I probably wouldn't even notice (unless you were wearing one of my Grandmothers old knitted numbers). I can't think of the last time I looked at a bloke and thought anything at all about his clothes.
I do believe what we are talking about is football kits (have I mentioned I haven't bought one for 30 years?). Get a white T shirt and paint some stripes on in dulux gloss, I wouldn't bat an eyelid unless you rock up at number 9 and miss a couple of sitters in it.
As I seem to keep repeating myself, each to their own, I don't give a fuck. BUT, as I was trying to point out, the whole idea was a bit of light hearted banter. If you want to take it at all seriously knock yourself out . . . .