Trauma and hemosemen
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This image shows a "masturbation brush" that has been placed under the abdomen of a stallion to stop masturbation. Stallions sometimes masturbate by slapping their penises up against the ventral abdomen, occasionally resulting in ejaculation. Despite the contention that this lowers the potential fertility of the stallion, objective studies have shown that masturbation has no significant effect on fertility. Often, masturbation brushes can traumatize the penis and have been associated with hemosemen as shown here.
As discussed elsewhere, this author prefers the term hemosemen to hemospermia because the former refers to blood in the semen while the latter leaves the impression that the spermatozoa themselves contain blood.
This image shows a "masturbation brush" that has been placed under the abdomen of a stallion to stop masturbation. Stallions sometimes masturbate by slapping their penises up against the ventral abdomen, occasionally resulting in ejaculation. Despite the contention that this lowers the potential fertility of the stallion, objective studies have shown that masturbation has no significant effect on fertility. Often, masturbation brushes can traumatize the penis and have been associated with hemosemen as shown here.
As discussed elsewhere, this author prefers the term hemosemen to hemospermia because the former refers to blood in the semen while the latter leaves the impression that the spermatozoa themselves contain blood.