I found this in one of my old emails with Kazuya (4/22/03):

Yes. It is a Heno-heno-Moheji. And there are the words, AEKA
and TENCHI, and also a drawing of an umbrella, the umbrella
of love ( I think you have this one in the Western countries,
too.) I read, if I'm right, in the BBS that Aeka drew this
picture. She had some frustration (perhaps with Ryoko) and
she just drew this graffiti. Maybe this golf ball appears in
the 3rd OVA.

-- 
RadHaz

nan des no kono miso shiru wa?