What might cause one to have a big penis?

[Phillynkd8]

I have read that genetics only plays a small part in penis size. Actually it has more to do with a woman's hormonal balance during her pregnancy. And specifically the amount of testosterone she produces during a certain trimester of her pregnancy.

 

[Nrets]

Definitely Genetics. Environment plays a role too, however. Everyone in my family has large penises except me. I think I was shortchanged because by the time I was born, my parents were old and anxious and possibly caused a sort of failure to thrive. I'm average at around 6 inches, but I know that my 6 inch shorter Dad and uncle have three more than that.
Still got some girth, environment didn't totally supplant the genetics

 

[B_big dirigible]

Pure Thoughts, no question about it.

 

[Mr._dB]

I take after my dad. He took after his dad.

 

[KinG916]

its genetic. but correlation doesn't prove causation, so not all sons of well endowed fathers will be well endowed

 

[whabb]

Gotta be genetics. I'm about the same size as my dad & my brother. Same size soft anyway- I've never seen either one erect.

In my case, it also may be that I had my fondest pre-puberty wish granted.

 

[meatfest]

Can't be entirely genetic. A girl I used to go out with had a fling with two brothers, not at the same time mind. They were both 6'8" tall. One had an 11" cock, the other only 8". (And I think that's the only time I've ever said only 8"!!!) Strange or what!