"And secondly, because both my BF and myself got the impression that he was being a bit chauvinistic in his male-approach to me."
Every time I'm with my Fiance[I'm a female] I have the same issue. I'm the expert and hands on person, with all animals, construction, plumbing, etc. But they always look to him, he is clueless and you can see it in his face, but they still insist because he is a man, he knows more than I do.
Even worse, when I'm alone and it deals with anything stereotypical as 'mans work' they always 'dumb it down' or explain certain words to me. It drives me up the wall, even when I tell them I know they still end up going back and being chauvinistic/sexist whatever you want to call it...