"Lazeelink, I've spent considerable time in men's locker rooms, both while playing sports and when I worked in an underground mine."
_Alceste

Alceste, I have no reason to doubt what you say. But the reality is conversations between men, in a locker room or not, can at times take a crude turn. Some of these topics would never be discussed or joked about when a woman is present. So it is not surprising you haven't been exposed to such crude manner.