What I’ve learned about marriage: You need to have each other’s back you have to be a kind of team going through life.

Petty frames marriage less as romance than as a durable partnership. The emphasis on “having each other’s back” suggests loyalty under pressure—defending one another in public, sharing burdens in private, and acting with mutual trust. Calling it a “team” highlights coordination and shared purpose: two people navigating practical life decisions, setbacks, and change together rather than as competitors or isolated individuals. The plainspoken tone also implies that the lesson is experiential—arrived at through time and difficulty—making the quote resonate as pragmatic advice rather than idealized sentiment.