Amanda at Pandagon, in a comments thread about sex-positivity, strawfeminists and anti-feminists, casually mentioned that some men can be multi-orgasmic, just like many women can train themselves to be.
How? With pelvic floor exercises (aka Kegel exercises).
As a physio, I'd always known that Kegel exercises were not only excellent for certain incontinence problems for both men and women, but also for enhancing sexual pleasure for women. I'd vaguely heard that men also benefited in gaining more control and intensity for their orgasms, but I'd never known that some men can be multiply orgasmic (not most, I'm afraid, however the duration of orgasm can be prolonged and the refractory period lessened through these exercises for anyone willing to stick with them for a month to gain the daily habit).
So, here's the how-to. Have fun, fellas!