Okay, when I was growing up: My mom's OB/GYN's son lived down the street and we were the same age. His big sister would watch us all the time. Sometimes, my other friend, whose Dad was a pediatrician, would invite us over their house to swim. The pediatrician also coached my soccer team and after games I would hop in his car and go for pizza. My best friend in high school's Dad was our family dentist. I used to watch his little sister sometimes who was friends with my sister. Finally, when I five years old my Dad did stint as a school counselor/psychologist. He used to let one of his students, a developmentally delayed girl babysit me. Once I asked him, "Did you every worry about leaving me in the care of a mentally ******ed a girl?" He said, "No," and that he didn't think she too delayed (she was...she was in high school but couldn't figure out the "Speak and Spell") but only paid her twenty-five cents an hour which was a good deal!
None of these people including my Dad, my mom's OB/GYN, my pediatrician, nor our family Dentist ever cared if their kids hung out with kids of patients/clients/students. People were at people's houses all the time. I think our Kid is going to encounter a lot of people growing up who are "Daddy's patients."
What's changed?