Actually probably any female. Though the percentage shoudl also be pretty hight for a 16 year old. Unless he is scary looking (or already has tools out like in this case).

I still tend to slow down and ask. Even a well equiped rider can have issues. In fact the only stop I rememebr was on The Grand Tour decades ago where I asked and the guy needed a tube. Already on his 3rd flat at the 25 mile mark or so. I had 2 tubes plus a patch kit so he got one of mine.

And asking everyone is good practice in case a hot chick needs help. And I'm much better at saying I ask nearly everyone when it is the truth.