Brad Pitt and Angelina Jolie have only been married for less than two years, but they were in a relationship for a decade before that. Find out how this longtime couple keeps the excitement in their relationship, according to In Touch Weekly.

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1. They give each other handwritten love letters

Apparently while filming in different parts of the world, the two would take pen to paper to hand-write love letters and then snail mail them to each other.

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2. Nothing is off limits in the bedroom

Roleplaying in the bedroom has never been off limits for the couple. Jolie even admitted that she once brought home her Maleficient horns. "I'm a sucker for that kind of [clothing]," she said.

3. They once tried to have an open relationship

The couple once tried out an open relationship which is where the two are free to date other people while remaining in a relationship with each other. They are happily married and presumably monogamous now, but they did experiment once.

4. They made up their version of the 5:2 rule

As previously reported, the two opt to spend five days a week together and two days a week apart. During the honeymoon phase of their marriage, it seems that it became apparent to the two newlyweds that if they spend too much time together, it hurts their relationship rather than helping it. Their solution to this problem is that Jolie spends two days out of the week away in a hotel.

Tags: Brad Pitt Angelina Jolie