Sex Did Not Evolve?

Life would be literally boring!

Sexual reproduction generates unlimited  random combinations of genes and chromosomes. Sex cells formation (called gametogenesis; spermatogenesis for sperm production and oogenesis for egg production) involves a special type of cell division called meiosis which  ultimately, produces a unique set of genes in every egg  or sperm cell. Every individual produced sexually has a distinct genetic make up. The random shuffling and recombination of genes during gametogenesis and the random fusion of gametes during fertilization account for the existence of a wide range of characters. So that eye color could be amber, blue, green, gray, hazel or brown.  Some guys  are good, bad and ugly. Ladies keep their eyes on the tall, dark and handsome. It's the existence of variability that makes life exciting... thanks to sexual reproduction!

Sex, though instinctive, is a very expensive and exhaustive process. Especially to animals with internal fertilization like us, who do not use water as the medium for fertilization; that is- for the sperm and egg to meet. There is a need to physically deliver the sperm cells into the female reproductive tract through coitus. The good thing however is that nature has developed an incentive which encourages humans as well as other animals to copulate. So that no matter how exhaustive and messy sex is, it rewards the individuals with a habit-forming ecstatic feeling which climaxes the sexual act. So addictive that many individuals indulge in sex not necessarily for procreation but more of recreation.

And that makes life exciting!!