The correct way to punctuate a sentence that starts: ツ'Of course it is none of my business butツ―" is to place the period after the word "but." Don't use excessive force in supplying m.o.r.o.n(EDIT : I seperated letters with commas in this word, because otherwise forum automatically replaces it with asterisk characters --> *****) with a period. Cutting his throat is only a momentary pleasure and is bound to get you talked about