Ed doesn't try to stop Oswald from hanging onto him, hands tight and up on his toes in a way that can't be good for his leg but for the moment, seems a small price.

His own experience with kissing is somewhat... vaster since arriving here. But he just brings a hand up to rest on Oswald's shoulder, on the juncture of his neck, and he kisses him back softly, a teasing brush then pressing their lips together.