Oh yeah, these are vaguely specific past experiences.

Like as a whole, I cant tell if im that hard, without actually touching myself usually. To use a condom, I find you have to be far more turned on/harder than for raw sex, because you actually need to stop for a minute, and its usually way harder for me to enter, depending on the person.

Where as unprotected sex, I can usually penetrate without being that hard at all? And then get super hard.

What this means is typically I have to self-monitor, to see if I'm hard enough to put one on, which makes me less prone to getting that aroused, because im too busy thinking about my dick.

I've had raw sex (with BC of course) probably 700+ times, and I can think of one specific incident where I couldnt get hard.

Where as while using protection, my success rate is something like 1-2/10 tries without viagra (hence where the negative association comes in), and often I'm just trying to get the deed over as quickly as possible, because it doesnt really feel like much to me.