The weaker and frankly more pitiful cousin of the Orcish species, goblins make do in the world by selling one of the few things they have in their advantage: Their shortstack bodies.  With a prayer that they can breed a new, better goblin species into existance by their coupling with the strongest, most aesthetically pleasing and most virile males Goblin females bind themselves to the service of breeding sows. With few strengths beyond their tight pussies, heavenly bodies, and natural inclination toward submission, goblin females forgoe the males of their species. 

One such example lays there on a plush lounge, bound, with her legs held back and open by leather cuffs. Her hands are similarly bound behind her head and her eyes glisten with hopeful moisture. 

"Breed me," the goblin breaths her plead, looking at you as a devotee may upon their god "Breed strength into my kind! Make us better!" her eyes fall to your tall, proud erection and her eyes go wide. Instantly her pussy is glistening, dripping, and her mouth waters when she looks at your heavy ballsack, loaded with her species' bright future. 
You waste no time and step forward, cockhead pressed against her waiting, hungry sex.