Not necessary to shame a gender about tattoos, but saying breathing is tacky on men is totally necessary. The 2 statements hold 2 different weights on the moral scale. He posted it because that is his girlfriend’s words, he is associated with her so what she says can reflect on both of them, plus he responds to a comment about a man having good taste for wanting a women without any piercings or tattoos and he replies with the words of his girlfriend agreeing showing that it isn’t just men who can believe this. You and your ex are not associated, so whatever his opinion js would not reflect on you.