Post Malone gives reality star Steve-O an X-rated tattoo on his face in honor of Steve's 50th birthday.

Why Steve-O Got a Penis Facial Tattoo From Post Malone

On Monday (June 17), video shared by TMZ shows Post Malone hanging out with Steve-O backstage at the Bonnaroo Music and Arts Festival and giving him a big penis face tattoo. The bizarre gift was part of the Jackass star's 50th birthday. Steve-O also revealed there was a very specific reason for agreeing to the tattoo.

"Let me tell you why I got it," Steve-O said. "It's to see how long before I'd tap out and get it lasered off. I'm determined to make it at least through my whole next tour, which starts this Friday."

Steve-O's new comedy tour kicks off June 21 and runs through Aug. 17.

Read More: Taylor Swift Has Post Malone's Face Tattoos in Music Video

Post Malone Has a Long History of Strange Tattoos

Posty is of course no stranger to bizarre, life-altering tattoos. The singer has a whopping 70 tattoos, with 15 of them on his face. Post Malone surprised his fans back in 2018, when he got "Always Tired" tattooed underneath both of his eyes. In an interview with GQ, Post explained the meaning behind the tat was quite literal.

"Under my eyes, it says, 'Always Tired,' 'cause I'm always tired," he said. Always touring, always working, not taking care of myself the way that I need to. I figured it was just very fitting for how I felt, so." He added that the ink was particularly painful due to its location. "This was the only face tattoo that hurt."

Post Malone also said he gets face tats because he's insecure about his looks.

Read More: Post Malone Awestruck by His New Madame Tussauds Wax Figure 

Get a closer look at the tattoo below.

Watch Post Malone Give Steve-O a NSFW Facial Tattoo

See the Most Recognizable Looks in Your Favorite Rappers' Careers

Nicki Minaj, Future, Lil Uzi Vert and more.

More From XXL