Hair doesn't grow back thicker when shaved; that's an old wives tale.

People have been telling me that all my life, but that's exactly what happened to me. It doesn't grow thicker each time I shave, it was just a one-time thing. But where I used to have blonde peach fuzz, I now have thick, bushy, black hair. And it didn't change until I shaved it.

I was 28 at the time, so it wasn't a puberty thing either.