All agreed, Superdickery firmly has its tongue planted in its cheek, but the humor in that old Batman panel predates the site (same with the Joker/Boner panels from Batman #66.) Needless to say, though, the humor in that panel is pretty evident because it's seriously a major WTF moment in its context. The other heroes mention women they're romantically involved with (romance having a high level of kissing and physical interaction) and along with that contextual setup Batman thinks of... Robin!?!
It's just odd.
About the... "topic." Seduction of the Innocent being full of crap I'm sure a lot of people have known for a very long time, comics having been growing out of the CCA for a couple of decades now. And, yeah, it gave us a LOT of crap in the Silver Age but because of that it's now a lot of fun looking back at this stuff.
I think comics are better off now with more dynamic and interesting characters that are living in shades of gray rather than strictly being "good."