Porn dialogue and storylines aren’t usually memorable, but Undetectable Equals Fucking Untransmittable isn’t your average hard-core film. Written, starring, and conceived by British adult star Kayden Gray, UEFU is a hybrid public service announcement and gay romantic dramedy that just happens to feature full-on gay sex.

Gray released the two-part movie in February on his JustForFans page for free, with the intention of educating as many as possible on U=U, the concept that people with HIV who maintain an undetectable viral load by taking antiretroviral therapy cannot sexually transmit the virus to others. The movie follows Gray — basically playing himself — hooking up with a newly out man, played by fellow adult film star Bishop Black. The movie’s first half, subtitled “Dirty?,” mostly follows the porn playbook for the first two-thirds; two guys text on Grindr, meet at Gray’s apartment, and get down to business. After the, um, climax, the story gets more complicated once the men discover a condom slipped off Gray. Repeating a question he asked during texting, Black’s character inquires if his lover is “clean,” something that clearly irritates Gray, who is HIV-positive in the film and in real life.

After Gray discloses his status, Black grows panicky and accusatory, angrily asking why Gray didn’t announce he was HIV-positive earlier.

“There’s nothing to tell. Because it’s fine, you’re safe,” Gray’s character says, struggling to keep his cool. When Black’s character asks if he has AIDS, Gray’s character responds, “No, no. I’m undetectable.”

Menacing internal voices hissing homophobic statements about HIV bounce around the head of Black’s character, who promptly storms out of the apartment. It isn’t until Black is on a lonely London street that an email from Impulse Group — a real-life organization Gray is affiliated with that aims to help gay men make informed health decisions — changes his perception. RuPaul’s Drag Race winner Bianca Del Rio, who just happens to emblazon Black’s T-shirt, appears in an explainer video that pops up on Black’s phone, hilariously yet accurately describing the realities of U=U. Black’s character returns to Gray’s apartment, and a touching conversation occurs about HIV stigma and disclosure as well as the pressures gay and bi men face during dating and hooking up.

“[UEFU] is based on many, many situations I’ve experienced and people I know,” Gray says. “One thing that is unusual about this scenario is that I have a bad-ass drag queen who has my back, appearing out of nowhere as a notification. What are the odds, right?

“That’s a fantasy I’ve always dreamt of; someone could explain it to this person, who I didn’t maybe have the courage to tell. It’s not usually a broken condom that makes me talk about [U=U], but I eventually want to talk about it. I wouldn’t necessarily think it was appropriate or have the time or courage to say it in advance, so eventually, I wanted to make things right. I don’t really think I owe this to anyone, but I try to educate people.”

The post-sex discussion in UEFU also includes Gray’s character explaining how the word “clean” is triggering for people with HIV. If someone without HIV is clean, what does that make someone with the virus?

“The only logical antonym to clean is ‘dirty,’” Gray says. “A lot of people have an image of what good means and clean means. We use those words to say, ‘I’m not a whore. I’m not having that much sex, so I wouldn’t have HIV.’ We operate with these very basic, stock images, not through any fault of our own, because we haven’t been educated to do otherwise…. In your formative years, you absorb information very well; then when you’re an adult, with the fear and stigma that prevails around HIV, you’re resistant to alternative information. There’s a lot of shaming around sex; it’s been going on forever. I think we like this clear idea of what someone is and we use HIV status to make a judgment on who that person is.”

UEFU’s second “episode” is a happy epilogue, where Black’s character has released his ignorance and lustily embraces a sexual escapade with Gray’s character. After the encounter, the men are shown comfortable and happy, able to revel in their satisfaction in a way they were denied previously because of shame and fear; it’s more romcom ending than the nonverbal heaving and heavy breathing that usually close out most porn movies.