Visiting my sister in Utah...
...we went to visit the home of friends of hers. They had 8 million kids (some exaggeration there). The yougest except a baby was about 4 years old. From time to time during our visit, the 4-year old would grab his mom's breast and hold it, I guess, for comfort as an insecure child might hang on to a particular blanket or stuffed animal. At a few points she breast fed the kid.
I did not know where to look. Still creepy after all these years.