So, I asked my obgyn this very question earlier today (had my yearly with her). Apparently hormones are partly to blame for this phenom - and some women do "lose it" as quickly and as abruptly as it started. Hormones are powerful things and mind over matter doesn't always succeed - i.e. just because I want to always feel like this and keep sexually active, hormones may prevent me from dong so at any time in the future. Not exactly what I wanted to hear. However, she said that a woman now has the same options as a man as far as treatments for low libido. So she stressed that anyone suddenly losing it should talk to their doctor about options. She said "a healthy sex life is too important to overall health to just give up on it". She made a note in my chart to discuss next time as well - so she can help me determine if I still have "it" or not (she's a great doctor!). So - just fyi....