What is the connotation of まぐわう (referring to intercourse)?


I understand that まぐわう essentially refers to the act of sex. But I'm trying to
get some idea of the connotation. In Yofukashi no Uta, it's
translated/localized as "copulate", which has a very scientific connotation in
English, as well as the connotation of producing offspring being the ultimate
goal. It's also rarely applied to humans in any normal conversation. Is that
roughly on point?

To contrast with this: to my knowledge, エッチ, だく, and セックス are much more
"commonly" used with a personable connotation, and やる being used more akin to
"fuck"'s connotation in English.

Sorry if such "nsfw" questions aren't allowed here @.@.

If it provides some context: a pretty vampire japanese nee-san was referring
to sex between humans with まぐわう, and a 14-yo boy was getting flustered by the
usage of that term, asking why she insisted on using it in particular.




Note that there is no entry for まぐわう in most dictionaries (including 大辞泉).
There is only
[目合ひ(まぐわひ)](https://dictionary.goo.ne.jp/word/%E7%9B%AE%E5%90%88%E3%81%B2/#jn-207711),
which sources Kojiki, the oldest text in Japanese.

まぐわう should be a verb made from まぐわひ, most probably so as to give pseudo
archaic effect in fictional texts. In other words it is almost never used in
real life (except perhaps half-jokingly among people who love fictions). As
such, it sounds literary and erotic without being dirty.

This may be just me, but it has some connotations of being passionate and of
being entwined during the act due to the similarity to まじる/まざる.

