Anybody who’s been in a long-term relationship remembers how exciting it was in the beginning—the butterflies, the racing heartbeat, the constant sex. But the truth is, for most couples, the heat eventually starts to cool. In fact, a 2016 study of heterosexual couples published in Archives of Sexual Behavior found that while there’s an upswing in sexual satisfaction during the first 12 months of a relationship, it’s followed by a steady decline after the one-year anniversary. (Womp, womp.)

Still, the happiest long-term couples among us obviously know a thing or two about keeping up the excitement—if they didn’t, nobody would be monogamous. We sussed out their sexy wisdom by talking to Amy Jo Goddard, sexual empowerment coach and author of “Woman on Fire: 9 Elements to Wake Up Your Erotic Energy, Personal Power, and Sexual Intelligence,” who regularly works with couples in long-term relationships. Here, the seven best tips we can learn from them.

Time brings a deeper connection

When that overwhelming can’t-keep-our-hands-off-each-other feeling fades, people often think something’s wrong, Goddard said. “But you’re simply moving into a new phase of the relationship.” Rather than freak out, solid couples take this comfort and closeness as an opportunity to explore a deeper level of intimacy that isn’t possible when you first get together, she explains. In other words, while all new relationships can be fun and passionate, the best is yet to come.

Unselfconscious sex is better sex

After you’ve been together for a while, your partner has learned all your weird quirks, witnessed your ugly crying face, and seen you naked more times than you can count. And guess what? They still want to have sex with you. Which means you get to stop worrying and embrace your confidence. It’s pretty common to fear judgment or rejection in the early stages of a relationship, explained Goddard. But as your emotional connection deepens, so does the opportunity for honesty and exploration.

Fantasies are meant for sharing

Being open and direct with your long-term partner doesn’t just nix awkwardness; it uncovers a whole new realm of sexual satisfaction. According to Goddard, it often takes couples a long time to be truly honest with each other when it comes to fantasies and fetishes.

“They might be excited about something internally, but have a hard time sharing with their partner,” she said.

With time brings comfort and the confidence to tell your partner about the deep dark desires you’ve been hiding from the world—like your dream to have a threesome or get it on in a public place. After all, your boo’s there to love you, not judge you.

Practice makes perfect

Sure, the sex may have felt exciting and magical when you were first hooking up. But, reality check: it takes time to learn just what makes another person tick.

“You get to know someone’s body in a very different way over time,” Goddard said.

So while a new beau may be able to get you going, only a long-term love can create a roadmap of every spot that makes your toes curl.

There’s one trait that keeps sexual excitement alive more than anything else, says Goddard: Curiosity.

“We have to stay curious about our partners and not think ‘oh I know them so well I can finish their sentences,’” she said. Remember that sexuality is a lifelong growth process, and just like your mind changes over time, so does your body. It’s only when people stop exploring, expanding, and growing their sexuality that they get bored and stop having sex, Goddard explained.

Instead of just mindlessly going through the motions when you hit the bedroom, successful couples keep bringing new energy, she said. “Sexuality is not meant to go on autopilot. It’s far more dynamic than that.”