Most Helpful Guy
It sounds similar to Florence Nightingale effect, so there is a controversial side to it, especially with a professional teachers. Anyway vast majority of female teachers in my school was not physically attractive enough for me to even start thinking in that direction, and as a man I tend to care more about it more than girls, also it's more likely to make me feel less attracted to a woman, because if a woman known more than me it can weigh on my masculine pride, well maybe unless she explain to me something that is related to thing that men are not expect to be good at. Anyway it's rare for me to meet a woman who have more knowledge than me anyway, so usually it's me who do the explanations, when needed. :)
Most Helpful Girl
Well I've never thought about it this way but generally I love it when people talk to me about things they're passionate about. It creates this sense of intimacy.