Space heaters are fantastic! My partner and I have very different ideas of comfortable, and they make liberal use of blankets and space heaters. That's waaaay better than turning the entire house into an oven! Plus I still make use of the space heaters, too -- making the bathroom toasty so you're not freezing when you step out of the shower is the best.
Women are biologically more susceptible to getting cold than men are (or conversely, men are more susceptible to getting hot than women are). Also most people in America need more cardio; it's not a gender thing.
Boris Kingma from Maastricht University Medical Center decided to take a closer look. He found that women have significantly lower metabolic rates than men and need their offices 3°C (5.4F) warmer.
That's a huge discrepancy! Obviously not something you can chalk up to individual factors like exercise rates or medical disorders.