latin: incursio astrum
Mid-missionary position the man pulls out, turns his back to the woman and defecates into her vagina. This maneuver is remarkably difficult, hence the likeness to docking a shuttle into a space station at 17,000 mph.
from the book: Dirty Sanchez's Guide to Buck Nasty Sex
I have a huge space-travel fetish and space docking is just like 'one small drop for a man, one giant orgasm for mankind.