Giant Pacific Octopus(Enteroctopus Dofleini)
It is believed that male octopus find mates through chemicals released by the female. The bigger the female the more attractive she is, the same goes for the males. The male than changes pigment as a mating ritual. He uses her response to see if she is ready to mate. Two sexual positions used are side to side or the male is on top of the female. Male octopuses have modiffied arms called hectocotylus. This arm is a meter long and holds rows of sperm. The male then buts this arm into the oviduct of the female octopus. Mating can take up to 4hrs. The female saves the sperm until she is ready to lay eggs. When the eggs are moving outside her body they pass the sperm and become fertilized. Males die few months after mating.
Australian Giant Cuttlefish(Sepia Apama)
Male Australian Giant Cuttlefish during mating season challenge one another for mating rights. During this contest no contact is made. They just give threatening signals to the competitor until one of them backs down. The winner usually the larger male grabs the female and turns her around so that they are face to face. He then puts a special tentacle reserved for mating in a hole near the females mouth and inserts sperm sacs. The male will cuttlefish will not leave her side until she gives birth a couple of hours later.
Garden Snail(Helix Aspersa)
Garden snails are hermaphrodites( contain both male and female reproductive organs). This does not mean they can self fertilize, they need a mate. The garden snails pair up through courtship methods. The partners then caress the others neck with their tentacles and insert a spiny mucus covered arrow like mechanism into any part of the others skin. This mechanism is called the calcareous why this process is done is unclear. then the snails insert their penis inside of each other at the same time. Then they separate and the mating is over. The sperm is internally stored until the eggs are ready to be fertilized. The snail digs a hole and lays around 80 eggs each.