Erm some women tend to have more pitch variation and they're more emotional so they're more likely to use encouraging tones er which can sometimes be seen to be slightly patronizing, whereas boys think it's soppy to be  emotional or  expressive way, so that if you're in school and you're asking people to read out in class, erm a girl would be more likely to be more expressive, whereas a boy would be a little bit more monotonous, and just sort of read it out and not put any emotion into it.