1. The Short Answer in 5 Seconds
My friend's case doesn't necessarily mean the pill did nothing. He got hard, but couldn't stay hard once he tried to go in, and at the same time a self-monitoring commentary started up in his head: "Still hard? Can I go now? That pill was expensive, come on, Tanjiro!" (a pep-talk line from the anime Demon Slayer). ED isn't only "can't get hard at all." It also covers not staying firm enough for sex. And ED can be physical, psychological, or a mix of both, so deciding "it's all in the head" from a single night is sloppy.
2. What Actually Happened
Here's the anonymized sequence. He took one cheap generic ED pill; the drug name and dose are unknown. He got hard with stimulation. But when he moved toward penetration, the firmness dropped. That's when a "don't screw this up" internal quality inspection kicked in, and his head felt as noisy as it does when you have the flu. He couldn't build sexual images on his own, and even watching adult video on his phone, it was "on the screen but not getting into my brain." In the end he let his partner take the lead, and after about two hours of cycling through hard, soft, stimulation, and back again, they managed to have sex.
The key point is that he wasn't hard for two straight hours. If he kept going soft and coming back, that's a different matter from priapism, the condition where an erection lasts four hours or more.
3. ED Pills Aren't an "Automatic Erection Button"
PDE5 inhibitors such as sildenafil and tadalafil help the blood-flow response when sexual stimulation is present. They don't force desire itself. Also, "a cheap generic" alone doesn't tell you which ingredient you took. Sildenafil-type pills can kick in later after a meal, especially a high-fat one, while tadalafil-type pills are relatively less affected by food. Conditions differ from pill to pill, so first check the name, the mg, what time you took it, what you ate, and how much you drank. And if it doesn't seem to work, don't take an extra dose on your own the same day.
4. "Come On, Tanjiro!" Eats Up Your CPU
In sexual medicine, watching your own erection and your "am I doing this right?" performance like a spectator is sometimes called spectatoring. In my friend's case, even if he didn't feel especially nervous, a hardness check may have been running nonstop in the background.
Attention you'd normally spend on touch, kissing, your partner, fantasy, and pleasure gets drained by thoughts like "Still hard?", "Should I go in now?", "That pill cost a lot," "What does my partner think?", and "It got a bit softer, is it over?"
Penis: blood flow is arriving.
Pill: supporting.
Brain: too many monitoring threads running.
Working memory: 99% in use.
Adult video: playing.
Sexual attention: gone somewhere else.
5. "Lag" and Working Memory
A large meta-analysis on anxiety and working memory (the mental scratchpad you use to hold and juggle information in the moment) found that the more anxious people are, the lower their working memory scores tend to be. So the feeling of "my head is loud and I can't build any images myself" is easy to explain with a model where attention and working memory are being eaten up by self-monitoring. That said, this isn't a diagnosis of what caused this particular night.
Sexual stimuli also don't automatically arouse you just because they're in front of your eyes. If your attention shifts to predicting failure or checking your body, even exciting video on your phone can subjectively feel like "nothing is registering." Hunting for a stronger video and scrolling fast can add choosing, comparing, and hardness-checking on top, which may eat even more CPU.
6. Alcohol, Food, and Fatigue Join In Too
Drinking can make it harder to stay hard. Fatigue, lack of sleep, a full stomach, when you took the pill, the ingredient, and the dose all play a part. So it isn't a choice between "psychological or physical." A mixed-cause mishap, where booze plus tiredness plus the pill's conditions plus self-monitoring each add a little, is perfectly plausible.
7. Next Time, Cut Down on the "Pass/Fail Judging"
The sensible move is to not make "I must get it in" the one and only goal from the start. Don't keep checking your hardness; bring your attention back to outside input like touch, warmth, kissing, breathing, and your partner's reactions. If you soften partway through, don't instantly call it a "failure." Riding the stimulation in front of you can be lighter on your mental load than piling on more phone stimulation.
If it keeps happening, tell the doctor who prescribed the pill, or a urologist, exactly this: "I get hard, but I can't keep it when it's time to penetrate." Beyond the type, dose, and way you take the pill, they can check blood pressure, blood sugar, lipids, hormones, other medications, side effects, and psychological factors as needed.
8. No Joking Around About This Part
Using PDE5 inhibitors together with drugs they must not be combined with, such as nitrates, is dangerous. If you have chest pain, feel like you might faint, or notice severe vision problems, stop sex and get medical care. If a hard erection lasts four hours or more, that's priapism and needs emergency evaluation.
The lesson of this story in one line: "It was expensive, come on, Tanjiro!" wasn't encouragement. It may have been the quality assurance department in his head running a load test on the live production system.
