Some people are better at exchanges. When they do someone a favor, they naturally assume it’s a transactional effort that they can cash in for another favor in the future.
Recognizing a situation as transactional is less intuitive for women than for men. That’s a generalization. Still, I think a lot of women (including me) will tend to do someone a professional favor and see it as a kindness rather than as a deposit. In friendships and relationships, favors are kindnesses; professionally, not so much.
You’re at a disadvantage if you don’t recognize this and the person on the other end does.