*shuddering as gon begins to pump them at the same time, killua wraps one arm around his back and pulls his head to his chest, ear to his thumping heart. tilting his hips, he angles himself so their tips touch (as, standing up straight, gon’s only reaches partway up his length) and sneaks his other hand down between them to rub his thumb over both their swollen heads at once, smearing his gathering precum from his to gon’s.*