I was trained in some Tantric sex techniques although not Tantric sex as such. By employing these techniques, I get much more intense and satisfying orgasms than previously, so I think that there are a lot of variables as to the intensity and satisfaction or orgasm or ejaculation. Riding the almost-but-not-peak for an extremely long period or time, for example, will guarantee an amazing orgasm!
I have just returned from a few days away with my wife at a lovely place by the beach, as it's summer in Australia. We had sex every day, mostly because I was very, very horny. I was horny because every time I got into my swimmers or showered afterwards, I found my flaccid size rather arousing. The visual impact of my size, both flaccid and erect, has a big impact on my sex drive, even in middle-age. My wife enjoys sex with me, perhaps or probably because of my size and me knowing how to use it. So beyond theories on ejaculation intensity, who's to argue, in an overall sense, that bigger isn't better?