If you ever taken a psychology course in college maybe you'll understand, but I'll educate you.
Its not that your attracted to your mother, by the physical features, thats creepy.
Its the psychology part, Studies show that when men are searching for a wife, or a person to settle down with. They use the template of the parents to find a suitable mate. This is sometimes natural instinct, but a girl or boy will seek out similar traits in a relationship, that resemble their parents relationship. When a child grow up, its learns from there parents what a settled down relationship consists of. So natrually, a boy or girl will seek out similar traits in their opposite respective gender. Boys if their mother was shy and gentle, a boy will be more attracted those qualities in women. If a girl thought her father was brave and kind, she might seek out a boy who's just as brave and kind.
As of course this isn't always the case in the real world because of divorce, and children who never meet there parents, and of course parents who are bad parents. This might create the instinct in the child to seek opposite traits.
Naruto mother is sometimes scary but can be very gentle and kind. Same with Sakara, just like Minato noticed.
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