Like, don't think I'd ever notice if there was a human hand in my bin. Don't think I pay enough attention to it. But a head, yeah reckon I'd notice that.

Don't feel you have to be limited to a body part. You might for example be astute enough to notice a different brand of yoghurt pot from your usual brand. Or perhaps there could be a steering lock in there and you wouldn't notice. Just go for it.