You wouldn't think so, but I was sautéeing garlic and onions the other night, and there he was, pacing around my feet and making happy Billy noises.
It took me a while, but I finally figured it out.
I make a fair number of dishes where cream is added to finish a preparation of sautéed vegetables. And when I cook with cream, I often give Billy the few drops left in the measuring cup. These dishes usually start with, you guessed it, garlic and onions.
Intelligent cat that he is, he has apparently decided that garlic and onions are a sign that cream (CREAM!!) must be coming soon.
Unfortunately for him, this particular dish went in a different direction, with raisins and pineapple and other good things (for humans), but no cream. I had to let him sniff my hands to convince him not to be such a pest.