Snake eyes. We have all received them and perhaps given them out too. The theory is localism can be attributed to any of the following, a dangerous break, crowds, sexuality, low wave count,nationality,drugs,infra-structure, ability level, age, culture, preferred board type,travel, strength, skin colour, webcams, reef breaks, fitness levels, land, surf schools, bays, affluence or even wetsuit colour.
This painting by Damian Fulton suggests the source. It has muscles and revels in consorting with it’s own. Yep it’s a man thing.