I'm undecided whether it's a good or bad thing that he wants to be shown their panties, rather than just looking for opportunities to sneak a look himself.
On one hand, it means a lot more work unless they're very careful.
On the other hand, they're always able to reject his wishes, although there probably will come a limit of when 'things he has done to win their affection > affection required to show their panties' sooner or later.