1. Mother smells tasty. Father is not. To give the mother at least four hours of uninterrupted sleep, she should sleep in a separate room, while father sleeps is nearby. (Received this advice from a nurse with first daughter. Worked over twenty years on all three.) 2. postpartum depression is a thing. Usually I start to keep an eye three to six month after. 3. Father testosterone can go lower. Will be back to normal six month to a year later. 4. First two months, when baby remains at the same spot where you leave it, are the best, don't miss them.