it's hermaphroditic; each individual has both egg-producing ovaries and sperm-producing testes

Imagine cucuk your own buntut with your kukubird. I think the feeling is very similar.

Then they reproduce itself, disadvantage of asexual reproduction is no chances for evolution. If genetic is weak against certain diseases, it will wipe out the population, but luckily, it can also reproduce sexually which will enhance it survivability.
The weak will die due natural selection. Those survive can exchange genetic code to produce offsprings that can combat certain diseases that wipe out those weaker one.

this is how i imagine 2 trans men have sex.

hello jemin haziq anwar saiful