teaching staff marital status & only children

[Doreen]

No: HPFGUIDX 13060

I was wondering about the fact that all of the teaching staff of Hogwarts are all single, apparently childless. 

Also, aren't most of the wizard families mentioned so far on the small side of only one or two children? There seem to be a lot of "only child" characters in the books.

Doreen, wondering if groups like ours give JKR gray hairs

"Shan't say nothing if you don't say, please," said Peeves in his annoying singsong voice. 
"All right --- please."
"NOTHING! Ha ha! Haaaaaa!"
Peeves the Poltergeist, Harry Potter and the Sorcerer's Stone


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