It's more than just creepy hoods...
For the toucher, it's about the juxtaposition of sensation: firm, cold, slick latex compared to soft, warm, velvet of (lady) skin...good for the sensualists. For the wearer, it's more about restraint and slight discomfort (for the subbies). OR it sort of distances your body from your lover. Like you can touch, but not actually touch (for the dommes).