It was less that Torin was concerned that Raksha was human and more that he didn't want the other man to feel like he had to do anything just because Torin was his master. Not that it was really Raksha's style, he was stubborn enough not to feel pressured like that but still it was there at the back of Torin's mind.
Torin was a little of both, shy and less experienced but Raksha was right as long as there was consent that was the most important thing.
As soon as Raksha's lips touched Torin's he felt like he was able to relax properly, he returned the kiss sweetly and tentatively slid his hand more fully into Raksha's, submitting to the other completely.