Mine is 30+ yo. He still knows when it's Spring. He has found uses for his toys and I know without looking what he's doing because of his special noises.
Mine is quick to regurgitate but will bring a little something up, roll it around in his mouth, and then decide 'nah, this is too good to share' and just re-swallow it himself. A real tease, so, sort of a selfish lover.
(Or maybe, after 23 years together, he just knows I am not a willing recipient of being fed parrot vomit... lol)