"It's better than eating humans, isn't it? But still...Eating fairies isn't the nicest thing. If ice cream's better than fairies, I'll switch to it. Deal?"
Tongue duly retracted, Gordin salutes to show how serious he is about not eating fairies. ...Not that he'd know one if he saw it, but still.

For the split second before Cu Chulainn makes contact with his back, there's a horrified thought that maybe he's out of his depth.
Only for that split second though; once they've assumed prime piggyback position, it's like riding a bike. ...Hypothetical bike.
"Alright, fair rider! I might be a bit rusty though, so promise you won't dig in the spurs if I'm slow?"