How do you know that? Male and female minds are certainly constructed differently, and appear to be interested in different things. Cosmetology, for instance: most girls and most women are fascinated by makeup, and the opportunities it provides to look marginally prettier. Men care much less... of course men don't wear makeup, but for the most part they don't even care much whether their women do. Just ask any man who has spent twenty minutes waiting for a woman to put on her face, only to find that she looks hardly different when she comes out from the bathroom than she did when she went in. (Protip: don't tell her this).
As for plumbing, well, I don't think anyone is really interested in plumbing, but men are much less deterred by the prospect of getting their hands dirty than women are.
Are these differences cultural? They might be, but there's pretty good reasons to think they're innate. It makes evolutionary sense for women to invest heavily in being good-looking and men to invest heavily in, y'know, accomplishing actual stuff.