Echo and Narcissus (Waterhouse painting) mythology. In Ovid's version of the myth, Narcissus was the son of the river god Cephissus and the nymph Liriope. His parents were told that he would live to an old age if he did not look at himself. He rejected all the nymphs and women who fell in love with him. One of these was the nymph Echo, who was so upset by her rejection that she withdrew from life and wasted away until all that was left was a whisper. Her prayers were heard by the goddess Nemesis who caused Narcissus to fall in love with his own
Falling in love in love as one of projecting the anima or animus onto the other person, with all the potential for misunderstanding that can involve. Two chemical reactions associated with falling in love are increases in oxytocin and vasopressin; and Elisabeth Young-Bruehl has suggested that "when we fall in love we are falling into a stream of naturally occurring amphetamines running through the emotional centres of our very own brains". With regard to sociobiology, it is stressed that mate selection "cannot" be left to the head alone and must require complex neurochemical support. Critics of such Neo-Darwinism point out that over-simplistic physical