[houeto]

IMHO - and this is just me - I'd say that it's not learned at all.

Animalistic behavior comes naturally. Decent civilized behavior, manners, etc. are taught -forcefully- to those that are raised in a disciplined environment. No surprises here. Keep your powder dry.

[ButThreeLeftsDo]

Much more vivid account of story here......http://www.thesmokinggun.com/documents/florida/meet-panama-city-bk-brawler-653092