Rapper Big Sean has revealed that while he doesn't have to ask girlfriend Ariana Grande's permission to write songs about their relationship, he does like to run lyrics by her and there's one in particular that's especially personal. 

In his song 'Stay Down', which is taken from his chart-topping album 'Dark Sky Paradise', he raps: "I got a million-dollar chick with a billion-dollar p—y/ Every time I come, I swear to God I feel rich."

He spoke to the Rolling Stone about the lyric and admitted that he is excited about how 'open-minded' she is when it comes to what he chooses for songwriting inspiration: "I don’t have to run it by my girl, but she hears. I played her the whole album before it came out, so she heard everything.”

“She’s super-supportive. It’s cool, because she was a fan of mine before anything. The first thing she said when she met me was, ‘Yo, I love your music,’ and she rapped my verse from ‘Gang Bang’ with Wiz Khalifa. She was just an actress on TV at the time. She’s very open-minded. I’m proud of her.”

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Listen to Big Sean's 'Stay Down' here: