Ventilating harshly, Optimus really had to focus hard to continue the motions of his own hand. Not because he didn't want to, of course, but because it was so hard to keep his processor on-task when he was suddenly so hyper-aware of his own valve. Of the...depths and dimensions of a oft-forgotten portion of his own anatomy. There was already a heavy lick of charge there, trapped inside by the simple touch.

So instead, he forced himself to focus on what Elita must be feeling as he gingerly explored inside, fingertip easing past the outer aperture as his own valve gave a sympathetic throb in response.