This was actually a really hard topic for me. Because it wasn't limited to romantic affection. There are so many great moments of affection in YA--between parents and children, siblings, friends, lovers, etc. But in the end, my favorite was a romantic one.
Will put his hand on hers. A new mood had taken hold of him, and he felt resolute and peaceful. Knowing exactly what he was doing and exactly what it would mean, he moved his hand from Lyra's wrist and stroked the red-gold fur of her daemon.Lyra gasped. But her surprise was mixed with a pleasure so like the joy that flooded through her when she had put the fruit to his lips that she couldn't protest, because she was breathless. With a racing heart she responded in the same way: she put her hand on the silky warmth of Will's daemon, and as her fingers tightened in the fur, she knew that Will was feeling exactly what she was.And she knew, too, that neither daemon would change now, having felt a lover's hands on them. These were their shapes for life: they would want no other.So, wondering whether any lovers before them had made this blissful discovery, they lay together as the earth turned slowly and the moon and stars blazed above them.