People love to talk about their kids. They will tell you that little Susie made a macaroni picture of a elephant and it belongs in the Louvre. They will tell you about the time when Johnny fought a bear and got rabies, and how now he has to live in the attic. Basically, tell anyone that their kids are collectively the greatest thing to burst forth from a vagina and they'll like you.
Many profs do not have children, they have Doctoral Theses.
Do not tell them that their paper is the greatest thing to burst forth from a vagina.