The idea behind this piece is trust. Not worrying about whether your partner will be there for you, you just know that they will.
I also love seahorses and how they exhibit a monogamy of sorts. While the male seahorse carries the eggs in his body, the male and female "date" during the entire time he is pregnant, which can be about 45 days. The couple meets at the same place every day, to reconnect and spend time together in a coiled embrace, until they separate and go about the rest of their day. Pretty romantic, I'd say..