In a Lost Galaxy episode, Leo tried to score a date with a girl but had to deal with her motorcycle-riding brother. At one point, the brother offers "Want to take her for a test drive?" The question hangs in the air for a bit before he clarifies "The bike!"
Not to mention that the last episodes feature the villain ordering suicide bombings.
Speaking of Mighty Morphin' Power Rangers, um, Jason/Tommy? They even provide more than one Shirtless Scene on top of having "breakup" episodes. And the dark dimension is of course potential Fetish Fuel for someone out there.
An early episode has Red Ranger Jack approached by an attractive young recruit, asking him to show her "some close-quarter defensive maneuvers."
Resident Cloud Cuckoo Lander Green Ranger Bridge, who falls asleep during an important meeting, is prodded by the Police Chief and responds with a half-asleep "Five more minutes, Sky." (referring to the Blue Ranger). Just one of several Ho Yay moments involving these two.
I just assumed they were roommates.
Or that Sky is usually the one who gets up early and harasses the others for sleeping in (meaning past 6, given how Type A Sky is).
In Turbo, they managed to get the villain being a terrorist bomber past the radar by referring to the bombs as "detonators" as she tried to bomb fire trucks, bridges, parks, skyscrapers...
Speaking of Turbo: In the movie, Divatox calls Rita. The view of Rita and Zedd's bedroom implies the two had recently had sex. Maybe the beginnings of Thrax?
Am I really the only one who remembers a certain T.J. centric episode about him and baseball? The monster was either named or had written on him "Ballzac". I doubt it was in reference to the novelist.
It's "Bowzock", the name of the Carranger villain group.
Don't forget the infamous episode of Turbo in which the Rangers are baked into a giant pizza. TJ confronts the monster with the wonderful quote: "We're here to toss your salad!"
Wild Force had main character Cole's parents murdered by the Big Bad prior to the first episode. Fox's censors would only let Cole's parents be murdered because the producers assured them that they'd be ressurrected in a later episode. Then, the series changed networks, from Fox to Disney/ABC, and the Disney censors hadn't seen any of the Fox episodes... so Cole's parents remained dead.
Ziggy: I would have laid odds that you were a dude. Dr K: ... Sorry to disappoint you.
While fighting a Vacuum Cleaner monster, Scott is able to get away with the pun: "Suck on this!"
Ziggy teleporting into Dr. K's chair as she was sitting down, causing her to sit on his lap.
It becomes Hilarious in Hindsight as both Milo Cawthorne (Ziggy Grover) and Olivia Tennet (Dr. K) have been dating since then.
Everything else in the metaseries, and quite possibly everything else in every other radar-monitored show ever pales before the non-sexual stuff RPM got past the radar. Specifically, the death of 99% of life on earth in a nuclear holocaust. That... doesn't show up in kids shows very often.
Ninja Storm had an episode open with Shane and Dustin ogling a computer with lines like "what a babe" and "check out the lines on her". Cam catches them and remarks "I hope you guys aren't doing anything illegal". Embarrassed, the two try to hide the computer, only for Cam to grab it and find they were looking at... readouts of the new motorcycles they received last episode.
In Ninja Storm episode "Nowhere to Grow," the plant monster moans in a seductive voice, and in the voice tells her little plants to "Grow baby grow," among other seductive one-liners. If listening, without watching, you'd think you were watching a cheesy porn.