Keep it to yourself

Sometimes people say things ...sometimes it hits a nerve (what they say ) other times it's rude and sometimes you just ignore it . Anyways if your friend gained weight why should you tell her "you've gained weight " I mean she already knows that , or if you haven't seen a person for a couple of years and then suddenly you saw that person and you'd go like "You've grown" (maybe height wise or figure wise or personality wise) and that person doesn't take it as a compliment , because maybe she's happy being young and fresh looking ,and the above statement says otherwise,or a guy of average height yet really slim tells his girlfriend when he first saw her that she's not short in a frustrated tone ,because usually guys like to be taller than thier girlfriends and girls like their boyfriends to be taller than them .Telling someone of African decent , that she's too butch because she has short hair and a masculine body ,even though she's straight .Telling someone "But you're 30 something, you shouldn't be going clubbing at that age " or mentioning a person's birthdate , even though that person doesn't like that .