The sauce is an undefinable personality trait that some women possess. It could best be described
as sexual confidence, or flirtyness, but it's not quite
either. Everyone knows it exsists, but no one really has a name
for it, hence the name
The sauce is very important. As Sizzles
law of attraction states: a physically attractive woman
who has no sauce, is less attractive
than a physically less attractive woman
with the sauce.
For an analogy: You could have some of the best egg noodles
with no sauce, but they won't be nearly as good as some ramen noodles
with awesome sauce on them.