I love those gnomes!

[Samnell]

IMC Gnomes are eusocial clanbased creatures 15" high and associated with fey. Gnomes are hermaphrodites and only develop sexual characteristics on reaching maturity
However Gnome maturity is triggered by enviromental and not temporal factors (ie gnomes can stay the same 'age' indefinately). All Gnomes in a clan are the children of a single mature female and her brood mate.
Gnomes beleive that the Land Provides and thus live simple lives, however working in cooperation they are capable of increidble feats of engineering and inventiveness (the tinkering aspect is a misintepretation of this inventiveness coupled withthe need for a 15" person to interact with a world built for 6 ft tall humans)

You forgot that gnomish males always run around shirtless (though in very cold weather scarves are allowed) and footie tights. They also frequently hold hands, sing, and are especially gregarious and cheery...but excepting the queen and her brood mate, all are asexual despite biological capability.