Unsurprisingly, experts all agree that a starfish in the bed spells disaster. It reveals the bed hog to be selfish and unaccommodating, both in the bedroom and in their daily life. It also indicates that they want to dominate the relationship by pushing their partner into a secondary role. Whether you let this take place in your own relationship is totally up to you.
We're of the mind that if there's a bed hogging situation going on, it's necessary to talk about it. It's not fair to expect one half of a couple to fight for an eighth of the bed space. If you're the bed hog and you think you just can't help the way you sleep, we'd like to encourage you to at least try to improve. It could be what ends up saving your relationship.