” … another vulnerable region.”

What he felt toward this little creature was not at all what he had anticipated. There was nothing merry or joyful in it; on the contrary, there was a new and distressing sense of fear. It was the consciousness of another vulnerable region. And this consciousness was at first so painful, the fear lest that helpless being should suffer was so strong, that it quite hid the strange feeling of unreasoning joy and even pride which he experienced when the baby sneezed.

Levin, on becoming a new father, in Tolstoy’s Anna Karenina