Such, then, in the love leech. Its attentions certainly cause a degree of inconvenience in any gentleman who would rather not be unavoidably detained for such a period, and no small embarrassment to one who is bathing with his fellows; but the experience is a short-lived one, and indeed maybe prized as a leisure source among certain tribes, where younger unattached males may closely guard the secret of the locations of lakes invested with the creatures.
However, in the lower stretches of the river, where it breaks into channels around great islands at the edge of the Atlantic, such activities are avoided by even the most headstrong, for fear of the related but far more unpleasant species, that known to all as the lust leech.
This second organism is clearly closely related to its kin, being identical in size and indistinguishable in physical appearance. Indeed, it has been suggested that the two species are one in the same, the only difference being one of behaviour and food source. Like its cousin, the latter species is formed around a hollow internal cavity lined with soft protrusions, and a sac on the anterior portion containing venomous stingers on its inner surface; and similarly, it shows remarkable ability both to grasp and latch onto its victims in short moments, and thence elicit an arousal which even the most worldly are powerless to control. It is perhaps yet more prone to make use of its poisonous spines to discourage even the gentlest touch on its outer surface, giving rise to an agony that makes any attempt at removal impossible.
However, the lust leech does not feed upon male ejaculate, but rather on the nutritious fluids emitted ceaselessly by the male member during the moments prior thereto. While it can only feed on smaller quantities produced in any given moment, this species is able to maintain its food source indefinitely.
The unlucky bather, under the finely-honed attentions of the creature's tentacles and the contractions of the muscles that fully surround his member, is drawn to the very edge of release; but, when his tormentor discerns that the stimulation has had the desired effect, and the secretions on which it feasts are being produced, it abruptly ceases all movement for a few seconds. During this time, any movement on the part of the host will meet with immediate retribution from the venomous flesh that engulfs his testes.
Following these moments of stasis, the lust leech senses that the immediacy of ejaculation has passed, and once again resumes its gentle ministrations, repeating the cycle endlessly.
The creature is amphibious, and able to coexist with its unwilling host for the duration of their lives. Some men are said to have been held in the tantalising state of arousal without release for a period of decades, going about their business unclothed to prevent any contact between their clothing and the sensitive outer surface of their tormentors, and with a hollow and hopeless look upon their countenances. It is truly tragic to gaze upon them, engaged in the menial duties allotted by their jeering companions, stopping still like statues every few minutes as a look of desperate hope comes over them, followed inexorably with a return to despair.
In some tribes, the parasite is applied deliberately as a punishment for the most heinous crimes, and it has been said to be used by married women whose eyes are turned to other men, in order to render their husbands incapable; under the traditions of these peoples, a man afflicted with such a creature has no right to divorce, and must continue to serve his wife's needs and provide for her, but must tolerate her taking other lovers even into their marital bed in order to offer that which her sire has had taken from him.
In one case, I heard of a man deliberately inflicting this terrible situation on his rival in love. Stealthily sneaking into the man's hut in the dead of night, he released the parasite alongside the sleeping figure, who awoke to find his fate already sealed. The female at the heart of the dispute was charmed at her suitor's ingenuity, and promptly took the aggressor as husband, while the victim retains his unwanted passenger to this day and is a figure of ridicule.