Jisho

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せいつう 精通
Common word Links
Noun, Suru verb, Intransitive verb
1. being well versed (in); being well acquainted (with); being familiar (with); having a thorough knowledge (of); being an authority (on)​
Noun, Suru verb, Intransitive verb
2. (a boy's) first ejaculation; spermarche; semenarche​
Wikipedia definition
3. Spermarche (ability to produce sperm)​The first ejaculatory experience of boys is termed semenarche. Spermarche refers to the beginning of development of sperm in boys' testicles at puberty. It contrasts with menarche in girls. Depending on their upbringing, cultural differences, and prior sexual knowledge, boys may have different reactions to spermarche, ranging from fear to excitement. Spermarche is one of the first events in the life of a male leading to sexual maturity.
Read “Spermarche (ability to produce sperm)” on English Wikipedia
Read “精通” on Japanese Wikipedia
Read “Spermarche (ability to produce sperm)” on DBpedia

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