Mission impossible: missionary position

I don’t know if there is any truth in this claim which I saw in an old Guardian report.

Apparently, according to a book by a respected French writer, sex research was conducted in space in 1996.

The mission of two chosen astronauts was to explore sexual positions possible in a weightless atmosphere.

It seems the two ‘guinea pig’ astronauts tested out 10 positions in zero-gravity conditions.

And the outcome was this:

• Four positions were found possible without "mechanical assistance"
• Six others needed a special elastic belt and inflatable tunnel, like an open-ended sleeping bag.

And the most damaging finding is that:

"The so-called missionary position, which is so easy on earth when gravity pushes one downwards, is simply not possible."

Read more on this in this Guardian report.