[Don doesn't have to worry - Robert is actually not perturbed (at least, not much) by the slickness, judging by how quick he is to bring his hands to the slippery skin to stroke it slowly.
He definitely looks... well, awed is probably the word, though mildly intimidated could work as well... at the sheer size of it, though. It definitely dwarfs his own penis, not that that bothers him any (he would've been far more bothered by the alternative). This doesn't stop him from lovingly bowing his head low to the glistening skin, giving Don a downright smouldering look as he does.]
... Sh-shall I...?
[He may look a little hesitant from the combination of not being entirely certain if he should have these foreign fluids in his mouth, and not being sure if he can even fit any of Don. His jaw isn't very wide...]
[Action]
He definitely looks... well, awed is probably the word, though mildly intimidated could work as well... at the sheer size of it, though. It definitely dwarfs his own penis, not that that bothers him any (he would've been far more bothered by the alternative). This doesn't stop him from lovingly bowing his head low to the glistening skin, giving Don a downright smouldering look as he does.]
... Sh-shall I...?
[He may look a little hesitant from the combination of not being entirely certain if he should have these foreign fluids in his mouth, and not being sure if he can even fit any of Don. His jaw isn't very wide...]