JamesLondon,
I started off with a 6 inch penis, now it is half that size. Years ago I wanted to grow breasts, so I started taking supplements. NatureDay at first, then I switched to Pueraria Mirifica. Took that off and on for 4 or 5 years. It worked. I now have breasts, but another side effect was that your dick gets smaller. That, combined with wearing a chastity device. A CB6000s, worn on and off for a few years will do it. Use it or lose it, they say.
Now my dick resides inside me (an innie), most of the time. Sometimes all I can see is the head sticking out. It's cute

I have to take Cialis to get hard. I can still cum with or without it, but it's much better with. When erect, it's just under 3 inches.
If you have the time, and don't mind having a pair of tits. That's one path to take.