Especially some of the ones we have over here that look and act 22-25 and are like 13-14, lol.
I can think of two 14 year old girls who I initially thought were early 20s. You have to be really careful.
A very nice girl started working in our office a few weeks ago. I initially thought she was early 20s (23 is about the youngest I'd consider for a serious relationship), but soon found out she was 17.
I admit I attempted to somehow justify in my mind how asking her out would not make me a cradle snatcher, but honestly I could never look her parents in the eye.
16 is the legal age in Australia BTW.