Yes. When my father had "the talk" with me, he included his advise about what would (more than likely) happen with my size. I knew dad was large from seeing him naked on several occasions. He said that his brothers and father were all well endowed, and that my brothers and I would probably inherit the trait. My grandfather had the same talk with my dad. I remember dad telling us to be careful when we have sex, and be gentle with our girlfriends, because we could easily cause pain.
Reviving this old post because it got me thinking...
What about ejaculate?
I'm a big cummer, both in volume and # of spurts, and I definitely remember my mother talking with friends (when I'd eavesdrop conversations between her and her friends) about my dad "making a mess" in the bedroom.
I also saw him semi-hard out by the pool a lot, as he'd sunbathe nude if he got off work early, and he'd be soaking his towel in what I'd later learn was pre-cum. He'd be out there with a semi for hours, then get up (cock swinging) and JO in the pool house afterwards, and I'd later do the same in high school, join him nude for sunbathing and occasionally I'd start to get hard, so I'd go shoot a huge load in the bathroom inside.
Many years later, after she knew my dad had "The Talk" with me, my mother would say not to get discouraged about how real sex isn't like TV or movie sex, as there's nothing about "what happened afterwards" in the film. "It's messier than on TV," she'd say in a joking manner, since at the time I was going through 2-3 sets of sheets a week being an adolescent doing adolescent things
I bet my old man was/still is a big shooter--kinda' hot how genetics works that way I guess.