The episode: “Hercules Against the Moon Men,” ep. 410
The riff: Chuckled by Tom as good ‘ole Herc stumbles through a small waterfall. He’s played by Sergio Ciani in this one.
The explanation: Irish Spring deodorant soap has been made by Palmolive since 1972, and is still around today. Tom is referencing a well-known series of commercials in the 1980s that played up the “Irishness” of Irish Spring and had men talking about it being a “manly” soap. Their women would then chime in, “Manly, yes, but I like it too.” And of course, being a son of Zeus with human parents, Herc is a demi-god.
Novelty factor: I know the Irish Spring brand, but these actual commercials are before my time.