Apparently I'm in the 15% of women with a strong libido. The only thing I've found that makes me NOT want to have sex is a partner who isn't a partner. Household chores are a piece of it, but for me it's more about the connection. If I feel connected with my partner, it doesn't matter how long we've been together, I still want to have sex. And often. When my libido has dwindled, it's mostly been related to realizing he was never a good partner to begin with or that he cares only for his own satisfaction.