成人论坛

Earthworms are very important for the health of the soil, and change its very character. There are millions in each hectare of forest. They eat their way through the soil and collect dead leaves at might. Earthworms are hermaphrodites, both male and female in one body. They go into their neighbours' burrows looking for a mate. A groove forms between the worm's bodies and they pass sperm to each other, which may take hours. Sequence includes infra-red shots of earthworms mating.