rdg, it's an american joke, about the "black hand" of sicily and new york, made famous in the movie "the godfather".
if the don kisses another man on the lips, he is marked for death.
sorry to not have explained it better at your expense.
No problem, bucky: only, I didn't know the expression "square lips". And I was asking WHY I had to kiss someone , and moreover tryng to square my lips.... .
Moreover again, I'm a very traditional man: I like better WOMEN.....