I don't think seeing a fem-bot seduce/distract a Decepticon is too far fetched, even for the Bay Universe. Perhaps one could be a sort of stealthy assassin who waits for Decepticons to be by themselves then approaches them, slowly scrambling their circuits as they stare into her optics...Another could emit an aura/signal that attracts the opposite faction (while not even in direct sight of her) which could lure Decepticons into an Autobot ambush point. Something along those lines...
Regarding Transformers being attracted to one another, we're used to seeing Transformers display a wide range of emotions so why not? After all, 99% of Transformers are bipedal for a reason. It's to make them human enough so that we can sympathise/relate to the various characters and how they act/react. If Optimus Prime turned from a truck into an 8 legged robot who talked out of his exhaust pipe would you feel as attached to him? We're used to seeing Transformers display human characteristics and this would just be an extension of that. Well, that's how I feel anyway![]()