Having entertained a vast array of clients (some of which insisted on paying him in the very same manner that Izaya was doing), the bit of rough treatment was something he could handle. Hell, it was something he expected, and he had the simple fact of being a part of Shizuo to thank for him not being in too much pain at each graze of Izaya's teeth. If anything the little flashes of pain only served to spur him on further.

"Good to see your mouth's good for something, huh, Iza-chan?"

It's a testament to his stamina that he's able to really last this long, but it probably wouldn't be to Izaya's benefit when all that pent up release finally erupted. The thought is enough to make him shudder a little, and, finally allowing Izaya a moment to breathe, he pulls his hips back just a bit to thrust gently on his tongue.

"C'mon, baby, open your mouth a little wider... I'll give you something good."