The most important thing in relationships is trust, right? But sometimes, you need to keep a few secrets from your partner. Whether it's sneaking upstairs to eat potato chips after midnight (guilty) or stealing their pillows while they sleep, the best relationships include an element of secret-keeping.

In a recent Reddit thread, one user posed the question: What's the worst secret your partner has kept from you, that you totally know about?

The answers were, well...pretty hilarious. Turns out we are all terrible at keeping secrets.

Here are a few of our favorites.

The Gossip Girl lover.

"At night, once I go to bed, he binge-watches Gossip Girl," one user wrote.

Another user commented on her husband's own indiscretions.

"I've walked in on my husband watching Gilmore Girls more times than I can count."

The secret recipe.

"I know her caesar salad dressing recipe," one user wrote.

"It's actually the best thing ever but even after two years she refuses to tell me what's in it. What she doesn't know is that I have secretly been watching her make it over the past few months. I have finally pieced it together and now I have the power!"

The chocolate lover.

"He hides chocolate bars in his work bag. Bastard."

The ring-hider.

"I knew for a year and a half about my engagement ring and never told him until after he proposed. He was not so good at hiding."

The toilet-dropper.

"My wife dropped my iPhone in a Port-a-Potty toilet," one lucky man wrote.

"Luckily it has been so used there was a large pile of s**t, which gently held the phone above the liquid. She cleaned it off and gave it back to me. A year later I upgraded and gave her my old phone. She insisted on purchasing a new cover even though I had a high-end OtterBox. I never understood why until one of the kids told on her."

The pillow stealer.

"She waits until I sleep to steal my pillows."

Same, to be honest.

The excellent present giver. 

"She is hiding baseball tickets for when my favorite team comes into town. She is waiting to give them to me on my birthday."

The secret snacker.

Everybody likes snacks, right? Some of us like chips, others like fruit, or yogurt. Well, my wife likes croutons. Frozen croutons to be exact and she tries to hide it like an alcoholic hides bottles of vodka. Where does she hide the croutons? In the freezer. At first, I'd put them in the pantry when we get home from the grocery store, but they'd always end up in the freezer. I'd be like, "Uh, hon, what's up with the croutons in the freezer?" and she'd act like she had no idea what I was talking about. Now here's the thing, I've tried them and now I'm addicted to them too. So now I openly eat cold croutons out of the freezer as a snack, and she tells me what a weirdo I am while she eats half the bag with me. No idea why she's embarrassed to admit what a genius she is for discovering such an awesome snack.

The vacation booker

This is a past-tense secret, but my girlfriend at the time decided to surprise me by buying a holiday to Brussels for us over my 30th birthday.

I accidentally intercepted the hotel conformation email, so decided it was a good time to propose, as I'd been considering it for about 6 months.

Act all surprised when she tells me, then when we're having dinner in the restaurant on the first night, I get down on one knee and propose.

We're celebrating our three-year wedding anniversary at the end of next month.

Sometimes, the world really is a lovely place.