I see you are relating kun to the I-Ching hexagram meaning earth and also receptivity.

Interesting connection, anon.

(By the way, possibly noteworthy, Qabala also means “receptive.”)

The more obvious connotation is by analogy with the Japanese suffix -chan, because in this context -kun is for an older youth, a male youth you are addressing who is of equal or younger age that yourself.

So Domo Arigato mofo