The blue coloration serves to warn others of the dangerous, poisonous, or otherwise toxic organism. This is perfectly normal and occurs naturally in many species (poison dart frogs come to mind). I figure this is just humans following evolution subconsciously.
Chopping off your dick and carving a hole in your pelvis to make a sock-vagina? Yeah... Not so natural.
The blue coloration serves to warn others of the dangerous, poisonous, or otherwise toxic organism. This is perfectly normal and occurs naturally in many species (poison dart frogs come to mind). I figure this is just humans following evolution subconsciously.
Chopping off your dick and carving a hole in your pelvis to make a sock-vagina? Yeah... Not so natural.