Hi, I'm 19 years old and have had this for a little over a month now.
It seems like a third testicle, same size, but connected to my right testicle. It is a harder then a testicle is, but not rock hard. It doesn't seem to be getting any bigger but its hard to tell. There is no pain at all.
Any idea what thing might be? I'm pretty worried about it! If you have any questions about it please ask.