Stardate 38157.3
Somewhere near the Sargasso Expanse
Aboard the Excelsior Class starship USS Centauri Ecliptic... Captain's Quarters

Fellatio was not an act that occured normally during Vulcan sexual intercourse and at first T'Prena had been hesitant to indulge her lover's request. It seemed somehow immodest to her.
However, where it concerned John Henry Armstrong, T'Prena was often at odds with her Vulcan heritage and training. She loved him and she wanted to please him. If he desired what other humans referred to colloquially as a "blow job" then that is what she would give him and logically she would do it to the best of her ability.
To that end she had studied various techniques from half a hundred worlds and a dozen species to which Fellatio was regularly practiced, among them the Deltans, Haliians and Bajorans. Judging by the pleased sounds coming from her lover's mouth as her deft tongue flicked along the shaft of his erect penis, T'Prena figured with a 99.8 percent probability she had mastered the technique to no small degree of skill.
Laying back on his bed the captain of the Federation starship Centauri Ecliptic lay naked, his taut, toned muscles flexing beneath his coffee brown skin. His eight and a half inch cock stood rigid in the air, while T'Prena rested on her knees at the foot of the bed, leaning slightly over the edge her body between his legs. She moved her soft, feverishly warm hands across the man's stomach and opened her mouth to take him inside. He groaned as his cock entered her mouth, sliding against her perfect white teeth and her slippery, hot tongue.
Her head began bobbing up and down and soon he started thrusting his hips in rhythm, matching her movements. He felt her fingernails tighten slightly biting into his flesh. He could feel her tightening and relaxing her throat muscles, allowing him to slide further in, holding him there.... before pushing him back out. His cock was covered by her saliva and he felt himself building quickly toward orgasm. He reached down and put one hand on the back of her head, guiding her movements.
When he came, he did so explosively and into her mouth. She held perfectly still, accepting his full gushing load inside herself ignoring the natural revulsion any Vulcan should have logically felt at that moment. She felt her lover's body go rigid, then relax, rocking with little aftershocks. When the tremors subsided, she wrapped one slim pale hand around his shaft and milked the dregs until she had every last drop in her mouth then she swallowed and stood.
"Was that good for you??" Her obsidian eyes fairly smiled down at him. He smiled back, sighing.
"Oh yeah...."
John Henry sat up on his elbows, a grin spreading across his youthful, handsome face. "Now, my dear," he told the Vulcan. "It's time I introduced you to what we Earthers call cunnilingus. I think you're going to enjoy it."
T'Prena arched one thin dark brow above her right eye. "Indeed??" She began to disrobe...