I'm not a big fan of regular heats on robots bc I dislike the concept of sexual reproduction
But
I like to make up shit, heats can be sexy and I'm headcannoning that there's a condition called "Racer's heat"
It's most prominent and was first discovered in racers (hence the name), however it's generally quite common for any speed-focused vehicle, fliers and beastformers.
Racer's heat is an issue that happens when the aforementioned types of Transformers are not able to satisfy their need for physical stimulation. It's essentially caused by (sports) cars not getting to drive, fliers not able to fly and beastformers being unable to move freely in general (for example by being leashed/caged, forced to sit still etc. A dog who doesn't get his walkies so to speak.)
The symptoms of Racer's heat vary from bot to bot, however it's most commonly recognized by any of these indicators: - increased body temperature - glitching in their vocalizer or optics - static running along their frame (imagine touching an old TV) - restless machinery (whirring fans, idling engine, spinning wheels, ...) - increased emotional responses (can be anything from bad temper to easy amusement or a general weepiness and sensitivity) - unusual avoidance or craving of physical contact and social interaction - lowered ability to focus on their task at hand - difficulty relaxing and a lack of enjoyment for anything - in bad cases even self-destructive behavior (picture a bird plucking their feathers)
It's not a dangerous thing most of the time and it's quite easy to treat by any kind of physical exercise (Driving, flying, running, sticky interfacing, fighting,...), however it can be quite bothersome for anyone involved because the affected bot is not able to work properly and the ones around them will have to be extra careful or else they might trigger some unpleasant responses.
I think among the more well-known bots the most affected are general high-energy bots like Blurr or Hot Rod, stressed and ill-tempered bots like Prowl or Starscream and those that were built for physical labor like Megatron or Rumble and Frenzy.
The cassettes in general can all be very unpleasant if Soundwave has them in his chest for too long I imagine, but that's a different topic.