19 But what of those who frequent promiscuous baths; who prostitute to eyes that are curious to lust, bodies that are dedicated to chastity and modesty? They who disgracefully behold naked men, and are seen naked by men, do they not themselves afford enticement to vice, do they not solicit and invite the desires of those present to their own corruption and wrong? “Let every one,” say you, “look to the disposition with which he comes there: my care is only that of refreshing and washing my poor body.”
That kind of defence does not clear you, nor does it excuse the crime of lasciviousness and wantonness. Such a washing defiles; it does not purify nor cleanse the limbs, but stains them. You behold no one immodestly, but you yourself are gazed upon immodestly. You do not pollute your eyes with disgraceful delight, but in delighting others you yourself are polluted. You make a show of the bathing-place; the places where you assemble are fouler than a theatre. There all modesty is put; off together with the clothing of garments, the honour and modesty of the body is laid aside; virginity is exposed, to be pointed at and to be handled. And now, then, consider whether when you are clothed you are modest among men, when the boldness of nakedness has conduced to immodesty.
Source: The Treatises of Cyprian (New Advent)