The male fossa has an unusually long penis and baculum (penis bone), reaching to between his front legs when erect, with an average thickness of 20 mm ( in). The glans extends about halfway down the shaft and is spiny except at the tip. In comparison, the glans of felids is short and spiny, while that of viverrids is smooth and long.  Fossa mating includes a copulatory tie , which may be enforced by the male's spiny penis. This unusually lengthy mating is due to the physical nature of the male's erect penis, which has backwards-pointing spines along most of its length.  The male fossa has scent glands near the penis, with the penile glands emitting a strong odor. 
When a spermatogonium enters meiosis, it becomes a primary spermatocyte and migrates away from the base of the Sertoli cells. Then it divides to form two secondary spermatocytes, which continue migrating and then divide to form four haploid spermatids. After meiosis is complete and each spermatid has the correct number of chromosomes, they differentiate into fully functional sperm. Mature sperm have a nucleus that contains the haploid genome and not much else. They also have an acrosome cap which will be used to penetrate the outer layers of the ovum so that the sperm can get inside. In addition, they have a single flagellum , which is a long, whip-like cellular appendage that is used for locomotion. A sperm cell lashes its flagellum back and forth to propel the sperm forward.
Cholesterol and Lipoprotein (a), Lp(a)
The most abundant amino acids (protein building blocks) in collagen are lysine and proline, and when collagen strands are damaged lysine and proline become exposed. A special kind of cholesterol, lipoprotein(a), is attracted to lysine and proline and will attach itself to the exposed damaged collagen strands. It is an attempt by the body to repair damage to the collagen of the artery walls in the absence of adequate levels of vitamin C. Unfortunately the repair is not ideal and over many years repeated deposits can cause the artery to become narrow and inflamed. Heart attack or stroke is likely to follow (usually caused by a clot forming at the site of the narrowed artery, or by a piece of plaque breaking off and blocking a smaller vessel downstream). When vitamin C levels are low, the body manufactures more cholesterol, especially Lp(a). Conversely, when vitamin C levels are high the body makes less cholesterol.