This is a very powerful aspect to have between two people involved in a romantic relationship, because it means that the relationship changes your whole life. Once involved, nothing is ever the same again, especially for you. Clearly, this aspect points to a relationship of real significance, but it also supports a long-term commitment -- which, let's face it, means committing to an incredibly powerful force that runs like a current between you.
This certainly affects your sex life in an incredible way. You both are healed and strengthened by your physical bond, and it is a source of pleasure for you as a couple, but also a big part of the foundation of your relationship -- the bedrock that you know you can always depend on. The transformation doesn't end there, though. You are attracted to your lover in the beginning because of a sense of power that you pick up on, right from the start -- Here is a person, you say to yourself, who's really got something going on! You're really intrigued by them, especially if they have a job that requires secrecy, or just a tendency to keep to themselves. Even if they're normally a secretive person, they love talking about their life with you, and over time, you both reveal your secrets, because you grow to trust each other so well. You both know that your relationship is the safe space you need in which to become the person you've always been.