Astarion relaxed as Thrawn's hands came to grip his waist- assuming that he intended to pull him closer. To find himself suddenly flipped over onto his back was unexpected though he took it with grace- no yelp or flailing, instead smirking as Thrawn looked down at him with that smug look on his face. Taking it in stride.

A hand moved to Thrawn's hair again, and he buried those slender fingers in those dark strands, head tilting back as Thrawn's mouth pressed to his neck- a soft hiss escaping him at the feel of teeth against his skin.

His free hand found its way to Thrawn's hip- fingers gripping firmly as he took the opportunity to do as he had thought Thrawn intended to- pulling him down against him as he bucked his hips up. He hadn't expected to be with a partner who preferred taking control- but that didn't mean he would be passively submitting to him either.