I'd tell them to get a belt, on e that is a bright color, to give that dress some pop. Unless they are going to a funeral.
I'd show then how leggings and tights are oft better than stockings, hose or bare legs, esp on older men whose veins blue and green , show. Burnt rose leggings would be nice with that. Burgundy leggings in the Fall.
I's show then about 10 ways to tie a scarf than may be more apt for the at dress, as that cinches then neck to much. It is a male ties of a scarf. Which is what they would be- but some feminine ties may be better.
I'd show them some creams that take away the lines on his hands and also ones that make the elbow gap he has not so noticeable.
A half Cardigan, which are stylish right now, I'd tell him to get. But to remember black and blue are a fashion faux pas.
Lastly, work on your posture and back arch-and watch the positioning of the hands. Open hands, feminine, slightly clenched hands, masculine