How low do healthy human testicles hang on older men?

I'm 63, and don't think my testicles hang lower than they did when I was younger. I'm still slim (5' 10 1/2", 155 pounds) but do have a little fat buildup around my scrotum. Other than that, no changes. My scrotum still tightens up when it's cold or when I'm aroused, and loosens up in warmer weather or when my penis is flaccid. I' AM 54YRS, mY LEFT TESTICALE HAS ENLARGED LENGTH WISE BUT NOT IN THICKNESS. IT FEELS TO DIVIDING INTO TWO TESTICLES SO THAT I WILL AVE THREE TESTICLES. iS SUCH A PROCESS KNOWN TO HAPPEN