to the OP – yours is an incredibly common problem.
You are using a condom that has a nominal width too small for the circumference of your erection. As a result, the latex is having to stretch too much to fit your penis. The force required to stretch the latex out, is reciprocated back onto the thing doing the stretching – that’s your penis. When the force is too high, it starts to feel tight, and uncomfortable (even painful). The solution is as obvious as it sounds.. get a larger nominal width of condom.
Sites like CondomSizer show you how to find the correct nominal width condom. And yes, the opposite problem is also really common – condoms that are too big to start with, don’t stretch enough and slip or fall off during use. Really, the idea of one size fits all when it comes to something as varied in length and girth as erections, is bizarre. It does make condoms really quick and cheap to make however. Ah, there’s why.
As for people, mostly women, saying things like “a condom will fit over my arm, deal with it” – well, this is just a kneejerk reaction caused by the topic matter (dicks). If your shoes caused this problem they’d happily suggest getting bigger shoes (some people have MASSIVE feet!).. if your shirt was too tight, then a wider neck would help (some people have MASSIVE necks!). But a penis? Oh no.. we can’t possibly acknowledge that penis could be big. I could equally say “a fire extinguisher will fit in a vagina, deal with it” – sure, it would.. it really would.. but it wouldn’t be comfortable. The arm analogy confuses fitting, with fitting comfortably. Last I checked, sex was about pleasure.. pleasure and comfort go hand in hand.. make your condom fit better, and it will feel better. When it feels better, you’ll enjoy wearing it more. Hardly rocket science.
And as for science, various clinical studies dating back as far as 1993 have all identified the issue that men have getting condoms to fit correctly. The common number seems to centre around 40–45% of men, either find condoms are too tight, too loose, too short or too long. So you’re not alone, and thankfully, not only is the solution REALLY obvious, it’s also really easy too. The average circumference of an erection is around 4.9” (varies depending on study used, but that’s the ball park).. long story short, a nominal width of about 52mm is appropriate for that. But girths vary up to 7” (and down to 3.5”).. and things like 6” are very common. But even 5.5” girth, about as common as size 10 feet (very very common), needs a nominal width of 58mm to be comfortable. That brings you onto another topic all together.. in the US, anything above 57mm is illegal by rule of the FDA. In Europe (500M people), we get up to 69mm.
Joe
disc: I make condoms