When I was 13 I hurt my testicle on a bike. All my weight went on the testicle and I remember having pain for a whole day... 13 is a time for developement of the testicles and im am 20 now.. I was wondering if i caused any damage to the testicle because even though I ejackulate normally and have no pains, the testicle I hurt is smaller than the other... should there be any long term concerns? thanks...