[It does occur to Robert, vaguely, that at some point - assuming Don's anatomy is indeed like most turtles' - the already-girthy shaft in his mouth is going to get a lot wider very quickly, and he doesn't think he has the skill to handle that without choking.
Still, it seems alright for the moment, so he dares to take Don a bit deeper, flushing with the effort and the wantonness of the actions (it's a bit late to think unprofessional but the word creeps unbidden into his consciousness). He's been fantasizing about this for far too long to feel too ashamed about it, though, so he just concentrates on keeping his jaw slack enough to allow for any thrust-like motions, and sucks him carefully, letting his wet palms stray all over Don's tail and phallus.
He mumbles something that might be muted assent around the organ in his lips.]
[Action]
Still, it seems alright for the moment, so he dares to take Don a bit deeper, flushing with the effort and the wantonness of the actions (it's a bit late to think unprofessional but the word creeps unbidden into his consciousness). He's been fantasizing about this for far too long to feel too ashamed about it, though, so he just concentrates on keeping his jaw slack enough to allow for any thrust-like motions, and sucks him carefully, letting his wet palms stray all over Don's tail and phallus.
He mumbles something that might be muted assent around the organ in his lips.]