"Likewise": like what? (1st 6 verses), all about being selfless, sacrifice
"dwell with them" - quality and quantity time (practice, put in the time)
"with understanding" - study her, know her.
Romance comes from sacrifice, effort, and planning, not convenience.
"giving honor to her" - truly value her, express it publicly
"as the lesser vessel" - being physically stronger, provide protection, safety, sensitivity, never intimidate
"joint heirs together in grace" - openness, togetherness, open book, sharing deep feelings and fears
"so that your prayers will not be hindered" - not losing our communication to heaven. Power source - power outlet
Source: Love Worth Fighting For (Kirk Cameron)