Is there are no rules
But seriously, think for a second, we don't want no filth, nothing too unsavoury, and nothing that will offend.
Its a nice site, a friendly site, and we want everyone to feel welcome and happy.
So think of it this way, we don't want any heated religious debates (as there are other places than a MINI website for this), we don't want stuff that if you are surfing from work that might get people in trouble, and we don't want nipples, pubic hair or filth like that.
So play nice, get along and don't make the site somewhere that people have to be careful what they click, as if they really wanted those things they would find them on dedicated sites for that stuff