I absolutely love how completely inappropriate this is for someone to say at work.
One of the secretaries for DH's department was talking to DH about how we still have an inside baby. She's in her 60s and tells her, "Tell your wife that you need to have LOTS of sex. I had 5 kids and it did it every single time! If she's uncomfortable, she should just be on top and that's fun for everyone. Tell her the old lady at work guarantees her that she needs to have LOTS of sex!"