Age or Generation?

I've been training at a new gym for almost a month now. The facility is only a couple miles from work which is a 20 minute drive from home. We workout in the morning before work, needless to say I'm forced to use the showers at the gym. All of the showers are private so it's not really that bad...EXCEPT...

In college the faculty would use the same locker room as the students in the REC. My fraternity had a chapter/faculty adviser that swam religiously so it was common to run into him at the REC. That's fine, Doc Reynolds is a great guy and everyone enjoyed listening to his stories and taking the wisdom he was willing to give...EXCEPT...

The problem in both of these scenarios is all the old naked dudes strolling around the locker room with their towel tossed over their shoulder. No lie, I've actually seen multiple nekkid men in a circle talking and stretching. WTF, who does that? When is this behavior acceptable?

In college I thought it must be an age thing. You know, when I get older I'll care less about flashing my junk or something like that. But now that I'm nearly 30 (I know 30 is not old but it's getting old) I don't have any less reservations about keeping my privates private. I started wondering if this actually has more to do with generation than age. I believe I'm on to something here. What are your thoughts? More importantly, does this happen in the ladies locker room and please tell me it's reversed...young ladies in their 20s like to prance around in what God gave them. Then as father time and mother nature do their thing to the elder ladies they start to bundle up.