Did you know that cephalopod sex is entirely "Manual"?
Sex between cephalopods (Octopus, cuttlefish, squid etc etc) is one of the strangest acts in nature.
The male presents an arm from the curious spoon shape and slightly shorter than the others, called ectocotile, transformed into a body organ and used to transfer the spermatophores to the female. In fact, unlike most marine animals, the male does not free the spermi in the water column, but pack them in spermatophores, generous "gifts" which deposits directly into the chromatophores cavity of the female using the ectocotile. Fertilization is therefore internal, even if there is no real copula. This unsatisfactory sexual act can last over an hour.
In some species, such as those belonging to the genus Argonaut, it passes almost to "SM Marino": the modified arm differs and remains in the cavity of the female mantle.
Eggs will then be laid by the female in bunches that are fixed on hard substrates such as rocks or wood. At hatching, they will be released in the water of young people who are very similar to adults.
You can't say the sex life of cephalopods is fun and varied...
(image by pierangelo purak, BBC - Text Andrea Bonifazi - Scienze Naturali)