Plutarch Conjugalia Praecepta 13

[13] Cato expelled from the Senate ¹ a man who kissed his own wife in the presence of his daughter. This perhaps was a little severe. But if it is a disgrace (as it is) for man and wife to caress and kiss and embrace in the presence of others, is it not more of a disgrace to air their recriminations and disagreements before others, and, granting that his intimacies and pleasures with his wife should be carried on in secret, to indulge in admonition, faultfinding, and plain speaking in the open and without reserve?

[13] Cato ejected a certain Roman out of the senate for kissing his wife in the presence of his daughter. It is true, the punishment was somewhat too severe; but if kissing and colling and hugging in the sight of others be so unseemly, as indeed it is, how much more indecent is it to chide and brawl and maunder one at another while strangers are in company? If lawful familiarity and caresses between man and wife are not to be allowed but in their private retirements, shall the bitter interchanges and loud discoveries of invective and inconsiderate passion be thought an entertainment pleasingly proper for unconcerned and public ears?