Amber Rose says sex is like vitamins ... you need both at least once a day.
We got 21 Savage's GF leaving E. Baldi in Bev Hills Friday when we asked if she got something special on her birthday -- i.e., sex -- and she said it's just another day when it comes to the bedroom.
She was sketchier on another topic ... Blac Chyna. Amber was on the phone with Chyna during our convo, and when our photog asked about our story that Rob was accusing her of being in a coke-fueled rage the day of the alleged domestic violence incident ... she deflected.