The henna work can always be reapplied - there is no sense in holding back in his efforts to pleasure her simply to keep the dye on her skin! At least, he doesn't think so.

He can tell her mind is drifting slightly off towards the bliss of ecstasy, so he does not hesitate much longer in giving her what she truly wants from him - his mouth on her arousal, using his lips and tongue to pleasure her - and his wings coming up to rest on her upper body (and within reach of her hands, should she choose to bury her fingers in his feathers instead of his hair) possessively.