IIN to wonder why women are much more often bisexual than men?

In my simple theory, I assume they are "bi" because girls drank breast milk from their mothers. So they feel a stronger connecting between women, because they are also women. Let's say a father can breast feed their son, (hypothetically of course) this would change the world as we know it. No more "you're a fag" and slurs would be used, because, almost everyone has done it! (Oh this is not a valid point, just a silly thought!)