I recently came across the word scooterette in an Indian newspaper. I wondered if this is an Indian coinage; a quick search on Google showed me it's almost purely Indian. I could not find a reliable dictionary reference, but this article says these scooterettes are scooters manufactured specifically for women.
What is the reason this suffix "-ette" is used to refer to a female? Are there other nouns which become feminine by this addition? Or is this just some neologist's portmanteau of scooter and dudette?