During a testicular exam on myself I just happened to notice at the bottom of BOTH testicles there is a small lump/bump. Is that simply the tail of the epididymis? No pain whatsoever and the bump is moveable. It doesn't seem like it's on the testicle itself. Is this anything to be concerned with? It is most noticed after I take a bath or shower and feels a bit harder for a short time. Is that just because everything is relaxed? Since it's on both testicles is it normal?