Is he neutered? Sometimes males will call for a female at night so maybe neutering will help if he already isn't, Im just trying to throw out some suggestions because lots of people would just say that is a Siamese thing but not all Siamese are vocal like that.
We breed short to long on purpose and every time we end up with a a plushy kinda long kinda short haired cat and the fur is amazing. It is my favorite!
Sometimes its even easier when you make sloppy food to have them step in it. Kittens and also cats have a natural reaction to lick things off of their feet. Hope this helps!!