The object therefore of this mixed passion, which we call love, is the
BEAUTY of the SEX. Men are carried to the sex in general, as it is
the sex, and by the common law of nature; but they are attached to
particulars by personal BEAUTY. I call beauty a social quality; for
where women and men, and not only they, but when other animals give us a
sense of joy and pleasure in beholding them (and there are many that do
so), they inspire us with sentiments of tenderness and affection towards
their persons; we like to have them near us, and we enter willingly into
a kind of relation with them, unless we should have strong reasons to
the contrary.