Copulatory

One way of preventing other males from mating with a female is to produce a copulatory plug—something that will prevent a different male from inserting his sperm inside a female to fertilize her eggs.

During copulation, the "male" individual uses his copulatory organ to transfer sperm to his partner's gonopore and fertilisation is internal.

In the mature male, one basal half of the left ventral tentacle is hectocotylised — and ends in a copulatory pad rather than suckers.

It is hypothesized that the cloaca everts to serve as copulatory organ.

Mating is usually nocturnal and may be confirmed by the presence of a copulatory plug in the vagina up to 24 hours post-copulation.

The examples Dawkins used were genes in orchids affecting orchid bee behavior (to increase pollination), genes in rattlesnakes causing avoidance behavior in other animals, and genes in male peacocks affecting copulatory decisions of peahens.

The reproductive system is designed for internal fertilisation, with a copulatory organ present in most species.

These include grasping cerci for holding the female and a secondary set of copulatory organs on the abdomen in which the sperm are held after being produced by the primary genitals.

They also have unique pubic bones that are fused to hold their gut. Unlike most birds, the males have a copulatory organ, which is retractable and convert long.

To mate, the male grasps the female by the thorax or head and bends her abdomen so that her own genitalia can be grasped by the copulatory organs holding the sperm.

When copulation is over, the male is no longer interested in the female sexually, but will prevent other males from mating with her by inserting copulatory plugs.