It's the same thing as a sibling wanting to go to the same schools as a spouse would want to go to the same school. Also if you think about it, it might be a negative to some people and couldn't help you at all. There are so many people that want to get in so I doubt them choosing you based on your husband/wife being there will factor in. Or you could say that someone is born in the US and did their dental school outside of the country. Do you think that person has an advantage over other people? No everyone is treated equally and seen for the skills they have, not the connections. Different people see things differently so it's up to you how to take it.