In tantra massage giving and receiving are separated and so over time it becomes fairly obvious to see the blocks we have to receiving. And the thing is that it's just not possible to force yourself to receive if you're not ready, nor force another to receive your attention. Yet we all attempt this one way or another and to varying degrees of intensity. In tantra massage, it's a process of learning to allow and deepen into experience whilst releasing our inner blocks/layers of conditioning. The receiver learns how to focus on their inner experience without the need to include or project onto the giver. At the deepest level, the resistance to receiving is really only our resistance to knowing ourselves as Spirit.
It's only when we can trust our own experience that we are able to stop resisting - this journey into trust is something that has as many different ways and forms as there are human beings.
When we own our experiences wholly without the need to appoint another as our authority, then there is nothing left to hide behind and all that is left is ourself. That is intimacy.