warming sleeve

I'd like to see an automatic warming sleeve to enhance the feeling of a lifelike pussy. Im sure you can warm the sleeve up and insert it back in but when you are in a place that you cant do that it woukd be much easier if there was a small button that started some sort of warming action on the inside via a battery or something.

Also its a long shot but maybe a self lubricating pocket where as you're stroking it the sleeve lubricates like an actual pussy.