Sissies have no dignity at all, sucking cock for them is like giving hands for others, the most natural thing in the world. If the owner tells it to suck another cock it will do it in a second, without hesitation, joyfully, grateful and focused to give the best service possible.
Letting another man penetrate you and allowing him to ejaculate inside your loins is one of the most embarrassing and emasculating things thinkable for a man. But youre no man at all so you feel rewarded, blessed and simply right being inseminated.