I've taught a lot of people (mostly men since most of my friends are guys) to shoot trap and skeet.
And I've learned that the heavier the firearm in comparison to the person holding it, the more they lean back to balance the weapon. So a small person will lean back more than a larger person. But almost ALWAYS it seems a new shooter leans back when trying to shoot a shotgun from my experiences.
I agree it's a novice thing more than a gender one.
WTB: multiautomatic ghost gun with a .30-caliber clip to disperse with 30 bullets within half a second. Must include shoulder thing that goes up.
Memberships/Affiliations: CERT, ARRL ARES, NRA Patron Member, HRC, CGN/CGSSA, Cal-FFL