Bloodstream

The guitar-driven song finds Sheeran singing about a drug experience. It was one of three tracks on x that the English singer worked on with American producer Rick Rubin (the others were "Don't" and "Tenerife Sea.")

Sheeran explained during the Live From MTV Presents the Ed Sheeran After Show how Rick Rubin helped him focus on the album process. "I think before then the album was good, but it was very much, 'Here's a Pharrell song and it really sounds like a Pharrell song,' and 'Here's an Ed song and it really sounds like an Ed song,' and 'Here's a West Coast hip-hop song that sounds like Benny Blanco' - it was all different songs," he explained. "And I think what the session with Rick did [was] it got me focused on an album process rather than just songs and it tied everything together."

Sheeran explained during a Spotify track-by-track that the song was written after an experience taking ecstasy in Ibiza, and it's basically about all the feelings that he got from that time. "It was weird," he said, "because I haven't taken it since, it was literally just a one-time thing." "It was a wedding, and I was having a mojito, and my mate was like, 'Do you want to try it, it tastes really bad if you put it in your mouth but I'll just put it in your drink and it'll be fine'. It was MDMA and I fell in love with a beanbag," Sheeran added. "I literally got home and bought six beanbags! During it all I felt a lot of things: I felt anxiety, I felt love, I felt warm, I felt a bit weird. And afterwards, you spend all day just thinking about what you've been through. So, I've only done it once and I've told my mum and dad about it."