What happens in bed? You will often be shocked at the burning passion that your Scorpio lives and inspires. His/her fervour takes your breath away, but leaves you longing for it...
As for the fear of not being left... There is no such thing with a Scorpio as your partner. No Scorpio wants to perform in other man's or woman's bed! (S)He tends to establish long-life relations.
One more thing you shouldn't forget: Scorpio is the sign of obsession and you are the goblet in which all his/her passion flows.
In front of a Capricorn-Scorpio couple, I can only bow with admiration. You can get over anything together!
All about Capricorn
All about Scorpio
Capricorn and Scorpio Horoscopes:
Capricorn and Scorpio Astrology & Love: