why is good grooming so difficult??

Many of us post here about lack of grooming in our ADHD husbands.  Why is grooming such a big issue with them?  My DH has the most disgusting feet and toenails you can even imagine.  Why can he not keep them trimmed??  He walks around barefoot, if I can see them he can see them.  I have asked him to keep socks or slippers on because his toes are gross and he tells me to get over it, it's just feet.  Ditto the fingernails--long, hangnails, raggedly.  Why??  Stuff in the ears--yuck.  Why is keeping yourself together such a big thing?  He showers every night and he does brush his teeth but his breath is terrible even still.  I have no idea why.  I am not being sarcastic--I want someone to explain the connection between ADHD and poor grooming.  I wonder if it comes from the same place as the "not seeing the mess" comes from--like those of us with husbands that can walk right by an overflowing garbage can and literally not see it.  That kind of thing--a lot of us post about that too--how do they NOT see _____________ (whatever it is).  Maybe it's the same with grooming.  I refuse to tell my 48 year old husband his nails need trimming.  My two teenage boys don't need reminding for crying out loud.  Don't you care what you look like?  

dvance