SO wants a boy

Hi everyone! I'm not sure if it's a mood swing or what but I'm getting very irritated with people who have negative opinions about my SO. He really wants a boy. His reasoning is that he never had a father to do man things with and wants the chance to do those things with his son. Since this is his first child as well he wants a boy first so he can learn all the tricks before having a baby girl . He is also terrified of having a teenage girl (teen pregnancy and fighting off the boys and all that). It boils down to him being scared of being a first time parent. when I tell people that they take it the wrong way as him not liking girls and become very offended. Surely he is not the only expecting SO to feel this way?