These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
"Funny Aneurysm" Moment: Johnny trying to get a chance to ask Farrah Fawcett out on a date before she leaves forever.
Hilarious in Hindsight: Little Susie had somewhat of a crush on Johnny, but he always found her annoying, favoring attractive women to the company of a little girl. The child's voice actress, Mae Whitman, went on to voice Katara from Avatar The Last Airbender and Rose from American Dragon Jake Long. Both of these girls are understood to be very attractive within their own shows.
Also much of it from Carl to Johnny. Carl pounces Johnny constantly (as in "Johnny Goes to Camp"), is very clingy despite Johnny shoving him away, all-too into playing Johnny's pretend date ("Charm School Johnny") or wife ("Chain Gang Johnny"), is impervious to the wiles of chicks, often thinking they're evil ("Forest Chump"), and even said he loved Johnny while standing up for him against an angry mob in "Lodge Brother Johnny". Heck, the episode "Carl Be Not Proud" is practically nothing BUT Ho Yay. Great lines like "If I can't make direct eye contact with Johnny, I'll die!" help too.
Occasionally Johnny will even do something Ho Yay-ish, like in "El Bravo Magnifico" he disguised himself as a woman and a Mexican man named "Caliente" hit on him, saying, "Surely a girl as pretty as you has kissed a man before..." Johnny's response? To break character completely and shout, "What? I was young! I-It was New Year's Eve, the cherry cola made me giddy!" He also will say things that probably aren't meant to sound weird, but do, like "Well, eatin' Carl did give me a hungry man's appetite." The episode "Endless Bummer" also includes lip contact between him and Carl (though this one was unintentional on Johnny's part). Not to mention the instances concerning background characters; so yeah, surprisingly a lot of Ho Yay for a show about a guy chasing chicks.
Tear Jerker: On Johnny's birthday, which happens to also be on Valentines Day, he finds the perfect girl for him, who actually likes him back. But at the end of the night it is revealed that she is a spy and wipes his memory of the entire night.
"You will forget everything that ever happened tonight."