[That makes him pout and whine more, getting more and more frustrated.]

You know what to do...

[As much of a tease as he can be, it still embarrasses to have to spell everything out explicitly...]

I...

[Fine. If you want him to beg, he’ll beg then, but only because it’s your birthday. He will get back at you later somehow...]

I... want you to continue what you were doing just now... I... I want you to lick me... suck me... stroke me... touch me... make love to me... please... Mitsutada-sama... please hurry... it feels so uncomfortable... please make me feel good... please...

[He’ll even get a little teary for good measure, for when he decides to do something, he puts all his heart into it.]