My question is at the age of 25 im still getting penis growth spurts. ive read that penises can grow from puberty till the 30s..... the only thing that i wonder is why it happens when i start a weight lifting routine. it doesn't happen while im weeks in, it only happens at the starting. i don't go very often so i think maybe its because its a shock to my body and i start taking multivitamins and such. the gain is mostly in girth, and its happened four times in the last three years.