Although this "red alert" may be a product of human society associating red with love for eons, it also may arise from more primitive biological roots, [Andrew Elliot of the University of Rochester] Elliot said.
Noting the genetic similarity of humans to higher primates, he said scientists have shown that certain male primates are especially attracted to females of their species displaying red. For example, female baboons and chimpanzees show red coloring when nearing ovulation, sending a sexual signal that the males apparently find irresistible.
"It could be this very deep, biologically based automatic tendency to respond to red as an attraction cue given our evolutionary heritage," Elliot, whose findings appear in the Journal of Personality and Social Psychology, said in a telephone interview.
And just for old time's sake...