Hmm, OK episode. The premise has been done a few times, of course. I did like Marge's sauna side plot, in the sense of her unusual loopiness afterward, and the actually kind of sweet sharing the sauna with Homer at the end. Not much else to say.
INTRO NOTES Crow left to right Ralph: It's dark! Barney: burp (no Stu, shorter opening) TV falls off
DYN: ...even the cafeteria Jello is tasteless? ..."Chicks with Cliques"? ...the chorus at the end doesn't do the Gracie sound? (Hasn't been a special version outside a TOH in quite some time)
Previous episode references 2F06: Homer's face sucked in by super sourness HABF15, JABF02, KABF06: Recent blasphemy of Lunchlady Doris talking AABF12: Homer eats a jar of mayonnaise 3F08: Westminster Abbey as a craft project, and "my dear Abbey" uttered 5F20: Lisa's fitting in reminiscent of this episode
Goofs A hidden sauna I can sort of see, but one with hot coals still in it? At least we'll never see it again. (Plus other house geography stuff, etc.)
Other notes Hibbert calls Homer a "supertaster" with his new taste buds; there's a They Might Be Giants song (on their first children's album, "No!") called "John Lee Supertaster", about a similar concept. If there'd been a montage of his super-sensitivity, that song could easily have been used. (There's precedent: "Istanbul (Not Constantinople)" in GABF07.)
Also, I forget offhand which episode, but in season 1 or 2 of Home Improvement, Wilson also names the state capitals in alphabetical order. I do believe the plot involved Mark dealing with a bullying kid and his bullying parents at karate class.