Eternity-
Hmm, interesting suggestion! I don't know I'd be the guy to write it myself... I've not taken the time to find out how talented with women the fathers of men I've known are. And I don't spend much time around the families of male friends. And my older male friends who are good with girls either don't have sons, or I haven't met them / haven't spent time around them.
I have a natural uncle, whose son has always been physically confident but never struck me as particularly socially confident. From what I've seen of his dating life, it's been pretty average. Genes probably play a big role; the son is much more like his mother, who is more reserved, quieter, etc. In general children will inherit much more of one parent's personality than the other's... you can see this in big families. Half the children (of either sex) will be like little Moms and the other half will be like little Dads.
My own father is at least somewhat natural. Confident guy, flirts with women, and has them approach and flirt with him. Lots of flirtation with my mother's sisters. Apparently did pretty well with women when he was young, but he doesn't talk much about when he was young and single. Certainly got my mother pretty easily and in a very confident way. I had very high social anxiety when young (again, taking after my mother... mother's family has high anxiety). Always had a natural-like intuitive grasp of social rules, and girls approached and flirted with me when young, but anxiety was a major road block for me.
My suspicion is the two big components are which set of genes did you get (Mom's or Dad's?) and have you gotten to see your old man in action. I got to see some of my father's, but don't use all his flirtation style... very chummy, lots of hugs, etc. Again, probably genes. But I use many of his facial expressions, voice tones, and mannerisms (and have used them more as I've gotten older, I've found).
Really at this point I think genes play the biggest role in whether you get a natural father's skill set. Do you inherit your father's personality or your mother's? Most naturals do not marry charismatic, outgoing women. They tend to marry shier, quieter women. If you the genetic lottery gives you Mom's personality you won't take to Dad's charismatic naturalness as well as you will if you get Dad's personality.
(also: if you want sons guaranteed to be outgoing, charismatic naturals, be sure to wife up an outgoing, charismatic girl. 50/50 chance a son gets your personality, 50/50 chance he gets hers. If you think your girl's personality would translate well to sexual success as a man, she'll give you talented sons)
Chase