The seed

[Justin Bieber]

Refers to ejaculating to become pregnant, semen must be ejaculated out of a males penis and into the womans vagina, up into the cervical opening.
A seed is an embryonic plant enclosed in a protective outer covering. The formation of the seed is part of the process of reproduction in seed plants, the spermatophytes, including the [gymnosperm] and [angiosperm] plants.
The seed was planted to further pass down in the family tree.
Semen is only one percent sperm; the rest is composed of over 200 separate proteins, as well as vitamins and minerals including vitamin C, calcium, chlorine, citric acid, fructose, [lactic acid], magnesium, nitrogen, phosphorus, potassium, sodium, vitamin B12, and zinc