Look at boobies.your standing infrint of a pinball machine. its backglass has a buxom woman with big boobies. there is one free credit, but no plunger what do you do?
Played a few text adventures, but the one I remember best came as a free tape on a magazine. Can't remember it's name, but the whole thing was set in a toilet cubicle.
It was probably Behind closed doors. http://www.worldofspectrum.org/infoseekid.cgi?id=0005998