I have done a a slow cooked beef joint today too! Didn't sear the meat this time, but it is in the slow cooker with three large onions, chopped, three carrots, chopped, sprig of rosemary, tomato puree and water to thin it a bit, hot smoked paprika and carraway seeds. It smells stunning - and it won't be ready to eat for another few hours yet!
I'm not sure if we did evolve to appreciate cooking scents - but what smells better than garlic softening in olive oil, or bacon cooking, or a shoulder of lamb cooking over charcoal - or a buttery chicken roasting? I wonder if a wild animal would respond to those smells in the same way that I do???