It's a given with him being a robot and all. Maybe your character find the mech attractive or is really into robots and wanting to get into his metaphorical pants. Could play him as having one cock or multi-cock. I can even add tentacles in the mix cuz why not. The reversal could happen with him finding himself attracted to a non-Cybertronian species and have no clue how to deal with the desires, because what are these emotions.

Limit to him being downsized is 10 ft tall or less. Or we could throw logic out of the window and have him at his original height- 30 ft tall, unless your character is also a giant/giantess. Either way, it comes with a bonus excessive cum. In particular, I'm looking for a smaller partner able to dominate or tease him, but I can swing him being the dominant partner.

Soundwave is an empath. His sensory input borders on telepathic empathy, and he's able to create a telepathic link with anyone for deep bonding. And I'd like to make use of that in a sexual situation and heightened sensations and sensitivity during sex. I'm thinking him and an assumed CR he's close with agreed to having a telepathic link together and test how strong they could feel each other's emotions by having sex. This kink focuses more on the emotional side of things than the physical.

Purely self-indulgence. soundy has an obsessive and possessive GF/BF and to prevent the crazy from coming out, he'll do just about anything, including fucking into exhaustion, to stop them from stabbing an innocent person who do so much as breath in his direction. Or he's willing to become a punching bag so they can satisfy their stabbing urges until they behave.

Welcome kinks but not necessary to include are violence, bloodplay, knifeplay.

So through some wacky science or magical mishap Soundwave is transformed into a human. That could be an opportunity for him to experience some human pleasure and stuff. His human form could either be a male or female. Open to include any of these; large insertions, futanari, tentacles...

Thinking of either him or his partner be enamored with and/or envious of the holoavatar's breasts. Paizuri, any and all breast-related kink. Could include outlandish things like lactations, use of clamps also *his human form is applicable, too.