BOKEP NO FURTHER A MYSTERY

A friend who’s in his thirties and savvy, with good friends of any age, employs “hehe.” I locate it charming—he’s an excellent speller, and he’s a lively, tidy writer, and his “hehe”s are a wierd mystery. I know what they necessarily mean: welcoming, to some degree sneaky giggling at a shared joke. But why The only “e”? an expr