Neither nymphs nor monkeys can steal a ring worn underneath gloves
since they can't see them. If such rings are randomly targetted, try to
take gloves instead.
Succubi trying to take worn ring of adornment will attempt to take
off worn gloves first. (Presumeably they can sense magic rings hidden
beneath gloves better than nymphs can; they're about to try to take all
worn armor off anyway....) If the glove removal fails, ring theft will
too. Likewise for incubi, remove gloves before trying to force the hero
to put on ring of adornment.
At the moment succubi and incubi can't remove gloves which are
blocked by a welded weapon, but they can manipulate rings then if there
aren't any gloves involved. I don't think that's right. The latter is
nymph-like and could be attributed to magic, but if that's the case why
aren't they able to remove gloves from under cursed weapons too?