Two G1 bunnies.
1. When the femmes visit Earth, the crew of the Ark are surprised and a little terrified when Chromia starts flirting with various mechs. What will Ironhide do? Well, nothing. He's actually been involved with Red Alert since Sentinel Prime's reign. Chromia is not happy that everyone thinks she is Ironhide's girl and demands that they finally admit to their relationship and maybe have a real bonding ceremony after all these years.
1A. Cliffjumper is Ironhide and Red Alert's creation. He's tiny (Red Alert is not that big), red (both), and has really big guns (Ironhide is so proud). And now he has a crush on another Ark mech. Chromia keeps giving him dating tips. Red Alert is looking forward to being a grandfather (the mech passed all of his background checks). And Ironhide is freaking out like the overprotective dad we all know he is.
2. Prowl is badly injured in battle. Ratchet has to remove large sections of his armor to work on him and finds a surprise beneath. No, Prowl isn't secretly a femme. He's actually a motorcycle who used heavy armor and various modifications to appear to be a car. Hey, Sentinel Prime was huge and it was hard to be taken seriously in the office when Prowl looked like a cute little motorcycle. (There were a lot of jokes about naughty secretaries. Prowl was traumatized. He still refuses to speak of it.)
But Optimus Prime doesn't have the same size snobbery and Prowl has to readjust to being a motorcycle. The twins are horrified to learn that Prowl is able and willing to keep them in line. The Decepticons have quickly discovered that size doesn't matter. And Groove wants martial arts and meditation lessons.