why do are americans and europeans obsessed with sex?

every time i go onto any board on here with flags i only see constant sexual content posted by americans and europeans it is absolutely insane and does not make any sense to me you would think that the poor countries would post more sexually explit content but it is more often than not an american or european poster i just want to ask what exactly caused this as in why exactly americans and europeans have an obsession with blacked dick and nigger porn?