Libra will get all the excitement they want if they marry Sagittarius. Sagittarius hates bondage and can not be confined, and will not tolerate bondage, whether it be legal or not, and will use all the means at his command to break through bonds. Again we have the tactful libra nature surfacing to create some harmony in the relationship. They will do well together, if sagittarius can manage to be around enough to fulfill libra's need for togetherness. This freedom loving sign will surly bring out the worst in Scorpios nature.
Mutual distrust is easy here.
The Scorpion possessiveness will make life unbearable for Sagittarius. It is true that from the sexual standpoint, Scorpio is attractive to the Sagittarian lust, but thats where the compatibility ends. Not a recommended combination. Live and learn is about the best thing to expect here. Both can bring out some of the other's better qualities but the chance of anything long lasting is remote.