Tears and Girls: a Signal for Intimacy
the primary purpose of tears in weeping is to signify a need for intimacy.
for adults, typically, it's attractive when done by female.
you can see, in media, for example Wrecking Ball: Miley Cyrus vs Sinead Oconnor featuring big blue eyes with tears. And also, in Lady Gaga ♪ Bad Romance
see also Reading Notes on “Intimate Behavior”