Visualizing the arrangement of organs during coitus

My favourite moment in Hitchhikers Guide is when God sends his final message to his creation - "We apologise for the incovenience"

That's what the researchers told the participants in this study of sex in a MRI. Especially when the participants failed to stand up and deliver. In case you think that the link's not suitable for work, read -

"The tube in which the couple would have intercourse stood in a room next to a control room where the searchers were sitting behind the scanning console and screen. An improvised curtain covered the window between the two rooms, so the intercom was the only means of communication. Imaging was first done in a 1.5 Tesla Philips magnet system (Gyroscan S15) and later in a 1.5 Tesla magnet system from Siemens Vision. To increase the space in the tube, the table was removed: the internal diameter of the tube is then 50 cm. The participants were asked to lie with pelvises near the marked centre of the tube and not to move during imaging. After a preview, 10 mm thick sagittal images were taken with a half-Fourier acquisition single shot turbo SE T2 weighted pulse sequence (HASTE). The echo time was 64 ms, with a repetition time of 4.4 ms. With this fast acquisition technique, 11 slices of relatively good quality were obtained within 14 seconds."

The researchers say the experiment was only possible thanks to the availability of a drug called sildenafil. Of course.