I think it usually becomes easier to forgive when you realize you are imperfect yourself, and want to be forgiven.
Trust is different, but it can go together with forgiveness. Sometimes I can be forgiving, because I am able to see the perspective of the person who hurt me, or I gain some empathy for them, but if I feel they will do the same thing again, then I don’t trust them.
Women don’t forget because they have a tendency to be more emotional (estrogen probably plays a part) and when a situation causes you more emotion you store it in the brain in emotional centers along with other areas. If that emotion is tripped again by a new situation, the old memories are also easily recalled, we get triggered.
Men tend to do a lot of shit that hurts and frustrates us, so there is a lot of material there. I’ve watched movies that have scenes of boys in childhood and if it’s true how they are represented it looks quite awful how they treat each other.