To be honest, Eccarius has never had his own dick bit (at least not seriously), so he's hardly in a position to judge any reaction Cassidy might have to it, but he does try to do his best to increase the pleasure enough to override any pain because he's such a generous boyfriend don't you know. Heaven forbid Cassidy should lose his boner before achieving climax.

Still fairly silent (any moans aside), he simply smirks at Cassidy's warning, his free hand snaking between his lover's legs and buttocks to add to the stimulation.