What do scientists really know about sex?

Times online Reports from the European Society of Human Reproduction and Embryology conference in Copenhagen.

The article contrasts male and female orgasm. Which apparently is a different thing. This conclusion is based on a PET study. Basically, the article argues that women fall into trance during an orgasm.

Men just fall asleep, or is that afterwards?

The study also found that

both men and women found it easier to have an orgasm when they kept their socks on. Draughts in the scanning room left couples complaining of "literally cold feet", and providing a pair of socks allowed 80 per cent rather than 50 per cent to reach a climax while their brains were scanned.

One assumption of the study that nobody seems to have questioned is that in men orgasm = ejaculation

As orgasm lasts much longer in women than in men, it is easier to study using PET - male ejaculation is over so quickly it is hard to get a reliable reading.

But is this really the case? Is orgasm = ejaculation ?

Is it possible to ejaculate without having an orgasm? Or, orgasm without ejaculating?

I think scientists have yet much to learn about sex, but thats only a good thing. Anyone wants to be a sex scientist?