To be honest, it's actually quite rare for a serious relationship to get off the ground when it comes to a Scorpio and Aries match. In addition to their fiery personalities, both signs are incredibly private beings. In relationships with other signs, they tend to be coaxed out of this, but with each other, it only seems to magnify the issue. It's pretty hard to get serious when neither party trusts the other.
The last issue we'll mention here is pride. Scorpio and Aries have a ton of it, and it can be a major roadblock to a successful romantic relationship. None will back down in a fight and in some cases, they'd rather witness the destruction of their own relationship than admit they were wrong. Our advice? Just nip it in the bud after a few saucy sexual encounters.