Most of these demands relate in some way to staving off a meaningful emotional connection, keeping things "all-business" etc. There's significant evidence that Einstein had a form of high-functioning autism (likely Asperger's). A signature symptom of Asperger's syndrome is discomfort with emotional intimacy and a lesser capacity for empathy.

I can't say if that's true or not, but if you combine these symptoms with the state of women's' rights at the time, this really isn't surprising at all - and in any case, there are far more explicit examples of sexism from this period.