I once sat with a friend in the living room to study for a test, and every so often someone would come to my father.
(Chevruta, a student for counseling. Just a neighbor to a question. Or a friend .. all kinds of people) And every time my father bothered and asked and brought a hot / cold drink, fruit, cake, etc. My girlfriend sat pissed off at how much he was investing in everyone who came.
After a while my girlfriend looked at me and said, "Couldn't you learn something from your dad about hospitality? You didn't even offer me an apple ..."
Shulamit (Horowitz) Nachman