It just might save their life.
Recently the TV presenter Jeremy Kyle found an abnormality on one of his testes and within two months of having it removed is back to full health - but if he hadn't found the lump, could have been dead within 18 months.
Sometimes it is so easy to overlook simple things like health checks, but they are vital.
So if you love anyone with balls, please get them to do this regularly:
(video from Embarrassing Bodies Channel4)
And because it's not always easy to talk about these things, here is the link to a Wiki page with lots of different words for those important love pods: