Signals

Never forget we are animals and despite our pretty minds we are still ruled, in large part, by our animal instincts. Hormones. Visual cues. Touch. Inputs into our brain no different than for any other mammal. And what are mammals but another form of gene carrier - life, by definition, is the transport vehicle of the Genes.

As such, boobies. Bat boobies, I suppose.

Also, the Griffith Observatory in LA. Science!