Most men are constantly touching themselves. Several of my nudie mates are a bit like me and quite regularly adjust or touch themselves whilst walking around nude. While we are always having a feel, it would be fair to say that we are rarely having a proper feel in the interests of our health.
Many years ago I thought I’d found a lump in one of my testicles so I went off to the doctor to get it checked out. It turned out to be nothing but there was a slightly awkward moment during the appointment. The female doctor found out I was a member of Bronte Surf Lifesaving Club at the time and told me her kids were in the nippers. Keep in mind that while she’s talking about her kids, she had my balls in her hand.
This video of a bunch of rugby players is a good demonstration of what to do and what to look/feel for. It also doesn’t hurt that it’s got a bunch of beefy rugby players with their balls out.