Kate Beckinsale refers to her private parts as the 'Pharaoh's Tomb'.The 34-year-old actress - who is married to film director Len Wiseman and has a nine-year-old daughter Lily with former lover actor Michael Sheen - insists very few men have ever enjoyed her 'sacred' place.She said: "I was called a sl*t when I split up with Michael and began seeing Len, but I've only ever had about three boyfriends. Only a handful of people have seen into the Pharaoh's Tomb!"The star also insisted her best asset is too "private" to discuss.She said: "My best feature is unfortunately a private matter, although I'm told it is spectacular. But you can't really walk it down the red carpet. What can I say?"Beckinsale also claims she and Wiseman are like an old married couple by Hollywood standards.She added to Allure magazine: "Now that we're approaching our fourth wedding anniversary I feel like we're oldly-weds rather than newly-weds, like we're in our dotage somewhat."