I think your guy is very wise, pl. That's very good advice.
According to Mr LM, guys generally prefer the "natural look" and that women do the hair/makeup/clothing to impress other women. That's his opinion, and I'm not entirely convinced it's true.
I go shopping in my sweats and PJ pants (clean ones!) all the time. Funny thing is, I always get ID'd at the liquor store when I'm dressed like that. The cashier looks at my DL and laughs. I never got carded when I was 14, but I do now. Strange.