And now I know the reason why somehow the food taste better. Although if you ask me the other psychological reason - it's also 'ego'. I think all this social media sharing of your 'happening', 'fun' life, it's showing off to your friends that you are having good time. Otherwise, why isn't anyone showing pictures or updates of time when they are sad, whey they are alone. Don't you think so?
Anyway, that's a separate topic.
For now, enjoy this article Psychological case for instagramming your Food
