As far as I know, "ascetic" means Yuyuko couldn't get to eat and enjoy all the food that she does. This is her way of souring Youmu on the idea to prevent her servant from turning onto a lifepath unpleasant for the master.
...or this......for instance, things like this...It means I wouldn't be able to do them any more.Let's see... 'Ascetic' could mean a lot of things, but...*pet* *pet*Yuyuko-sama, what is 'an ascetic lifestyle'?*squeeeze*
