You are thinking like a scientist at the start of the week, and your interest in your own emotions is almost clinical. You're in a logical, observational mode; but, as you know, some things simply can't be calculated. This is loud and clear on Wednesday and Thursday especially, when you find yourself getting along remarkably well with people you hardly know. Chalk it up to chemistry. Friday your relations with others are less smooth -- for reasons not entirely clear -- but a great conversation on Sunday sets you on a good course for the week ahead.