Sex exhibition differs in man and woman because of the differently combined internal secretions that are their substrates.

To reproduce cacti, one has to simply cut off a piece of the cactus, allow it to dry for a few days and then just place it over the cacti substrate.

After one and a half days the substrate should be sprayed with water three times a day with a shower pointing upwards so that the water falls on the bags like rain.

Time was, a "book" was something produced by many months' labor by a scribe, usually a monk, on some kind of durable and sexy substrate like foetal lambskin.

Gutenberg's xerox machine changed all that, changed a book into something that could be simply run off a press in a few minutes' time, on substrate more suitable to ass-wiping than exaltation in a place of honor in the cathedral.