Marks you as somebody who reads way too much into stuff, that's for sure. One person in the sentence is male. The other person is female. The female person is

Marks you as somebody who reads way too much into stuff, that's for sure. One person in the sentence is male. The other person is female. The female person is described as never going to use some skill the first person is teaching her. Maybe she owns the company. Maybe she won the lottery. Maybe, just maybe, learning CSS isn't that much of a super-cool thing to do. Maybe we're taking all of our pre-existing bullshit and putting it into some random sentence in some article somewhere. But definitely not an eater.