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Birds do it, bees do it, and thanks to all that dopamine, our cousins the baboons do it too. Just like us, they fall in love...
Love in a cold climate: Romance in Anna Karenina opens up previously unseen depths

The Brain in Love: Irrational Passions
And the object of her desires? Not the dashing, heroic Vronsky my teenage eyes had conjured up, but a damaged, aimless, limited soldier, in love as much with himself and his way of life as with any woman. This, after all, is a man who despises his mother but obeys her, who leads on the young Kitty, not from malice, but because he doesn't even notice he's doing it, and who sets out to build a hospital on his estate not to do good, but to prove he isn't mean.
· Keeping the home fires burning: Dying of a broken heart
Unwanted advances often border on the ridiculous
· See Also Old romances are being rekindled via an internet site at a rate that is alarming for marriages

The divorce rate has stabilised among the middle class but is increasing among the poor, explaining why many separated fathers pay little or no child support.
A new study reveals that financial hardship is a major cause of family breakdown. Low-income parents are more likely than others to break up - and they remain poor after the split
· How poverty is pushing families into divorce