Dexter told Delilah to sit in front of the fire and he'd give her a nice head massage. He assured her it would be very relaxing and she would enjoy it.
Delilah was hesitant as she is with every new experience, but she did as he asked and Dexter set to work giving her a vigorous tongue massage. And he had told the truth. After a couple of minutes, Delilah was catatonic and completely blissed out.