Don't let cancer mess with your testis! Knowing your vas deferens from your epididymis makes a vast difference when checking your balls. Some folks mistake these scrotal structures for abnormal lumps or cancer during a testicular self-exam, so make sure you know the deferens -- ahem -- difference!

The epididymis, where sperm mature, sits atop your actual testis (the ball part) and feels like a soft swelling inside your scrotum. The rope-like vas deferens, which carries sperm from the testicle to the seminal vesicles and then the penis, leads out from the epididymis. Now you have an excuse to grab those gonads!

I'm working on a testicle exam chart to encourage men to grope their balls during Testicular Cancer Awareness Week, coming up in April. Anyway, give us feedback on our chart! We kind of figure most men touch their testicles at least once a day -- the need to adjust, don't ya know -- but that may not necessarily mean they are actively looking for telltale lumps. So, we'd like to take a very unscientific survey -- men: how often do you touch your balls daily? The results will be included in our final poster as one of a handful of Nutty Nuggets!