From what i've read of most clinical definitions of male orgasm , you'd never know any sensations are involved at all, most being focused on the obvious the physical processes involved. The sexual community online seems to have a confused definition of orgasm and ejaculation and many believe that both are synonymous and physically inseperable. I don't think this is true. It's quite possible for us to EJ without the O, and also possible to O without the EJ... if you follow me. Most of the time it's a combination of the two. I think females do this too, but being male means being "rigged" for relatively easy EJ. O can be just as elusive for men as it is ( and has been rather well publicized) for women.
EJ feels like it is; a series of physical contractions and emissions, sharp but not lasting.
Orgasm seems to much more emotionally fullfilling, probably involves a more advanced part of the brain or a different/ larger part of the nervous system... it's just broader, better, more encompassing. It might involve rapid breathing, clenching, tingling sensations, vasocongestion ( reddening) in the upper body ect, leading up to the climactic moment. Who's really is aware of what's happening then or thereafter hmmm?
So, I don't personally believe that volume of ejaculate really improves the subjective outcome ( not a pun!) of male climax. I believe the pleasure, in that case, is taken as pride-of-performance.
A man's glans and a female's clitoris are largely homologous, or the same. Somone pointed out that the clitoris has more nerve endings. I've heard that, because of it's size vs the glans, the nerve endings are simply more concentrated, and produce similar sensations. For us, stimulating the glans (head) leads to a orgasmic response, and on the ventral (underside) stimulating the frenum is more likely to induce EJ. Wish all the women's and men's mags out there would pick up on this.
Sorry I just realized how dry and clinical this post is. That's the influence of textbooks i'm afraid. Thanks for reading!