These two signs are known for being hesitant to let their guards down. It's something they often hide in front of other people, but with each other they're able to be completely honest about their feelings. This is particularly true if either party has been hurt in a previous relationship - they take a long time to heal and learn to trust again. Luckily, with each other, they can be themselves.
Unfortunately, there are some downsides to strong emotional connections such as the one Scorpio and Cancer share. Both signs can be irrationally jealous and possessive, which often comes down to their difficulty trusting people. What often ensues is marathon talks about feelings, which can be emotionally and physically exhausting for the couple and their relationships. In order for their romance to survive, they'll have to learn to trust each other.