What was the most awkward question your child asked you and how old were they?

I've been extremely open with my kids. No topic is off limits as long as the time and place to discuss it is appropriate. However, probably the most awkward for me, was when they (as teens) asked how old I was when I lost my virginity and what that experience was like. I tried not to let them see that it unnerved me a bit, but it was fairly evident, lol.