The Children Kingdom appointing Altera as their father figure. If one remembers how many children her historical counterpart fathered during his life, the kids were right on the money.
Doctor Roman picks Berserker Herakles as a good Servant for a first time user, which turns out to be sexual. In the Greek myths, Herakles was as great a lover as a fighter, took his boyfriend with him on the Argo, bedded fifty Amazons in a single night, etc. He probably WOULD be a good first time!