I’m not even talking about Shi’urim.
In the original article I then added, “In the special collection of the Steipler’s letters to unmarried men dealing with problems of personal holiness (adapted from Kraina De’iggresa) he writes: It is a Torah prohibition of “Rechitza” to wash Keri off the flesh on Shabbos, even with regular water alone and no towel. Since this is false, I assume he was trying to stop his questioner from Aveiros this way. (This is from my notes; I’m away from a good library and I’ll try to find the reference later.)”