Fabrizio del Wrongo writes:

Edgar Rice Burroughs (1912):

To Jane the strange apparition of this god-like man was as wine to sick nerves.

From the description which Clayton and her father and Mr. Philander had given her, she knew that it must be the same wonderful creature who had saved them, and she saw in him only a protector and a friend.

But as Terkoz pushed her roughly aside to meet Tarzan’s charge, and she saw the great proportions of the ape and the mighty muscles and the fierce fangs, her heart quailed. How could any vanquish such a mighty antagonist?

Like two charging bulls they came together, and like two wolves sought each other’s throat. Against the long canines of the ape was pitted the thin blade of the man’s knife.

Jane–her lithe, young form flattened against the trunk of a great tree, her hands tight pressed against her rising and falling bosom, and her eyes wide with mingled horror, fascination, fear, and admiration–watched the primordial ape battle with the primeval man for possession of a woman–for her.

As the great muscles of the man’s back and shoulders knotted beneath the tension of his efforts, and the huge biceps and forearm held at bay those mighty tusks, the veil of centuries of civilization and culture was swept from the blurred vision of the Baltimore girl.

When the long knife drank deep a dozen times of Terkoz’ heart’s blood, and the great carcass rolled lifeless upon the ground, it was a primeval woman who sprang forward with outstretched arms toward the primeval man who had fought for her and won her.

And Tarzan?

He did what no red-blooded man needs lessons in doing. He took his woman in his arms and smothered her upturned, panting lips with kisses.

For a moment Jane lay there with half-closed eyes. For a moment–the first in her young life–she knew the meaning of love.

But as suddenly as the veil had been withdrawn it dropped again, and an outraged conscience suffused her face with its scarlet mantle, and a mortified woman thrust Tarzan of the Apes from her and buried her face in her hands.

Tarzan had been surprised when he had found the girl he had learned to love after a vague and abstract manner a willing prisoner in his arms. Now he was surprised that she repulsed him.

He came close to her once more and took hold of her arm. She turned upon him like a tigress, striking his great breast with her tiny hands.

Tarzan could not understand it.

A moment ago and it had been his intention to hasten Jane back to her people, but that little moment was lost now in the dim and distant past of things which were but can never be again, and with it the good intentions had gone to join the impossible.

Since then Tarzan of the Apes had felt a warm, lithe form close pressed to his. Hot, sweet breath against his cheek and mouth had fanned a new flame to life within his breast, and perfect lips had clung to his in burning kisses that had seared a deep brand into his soul–a brand which marked a new Tarzan.

Again he laid his hand upon her arm. Again she repulsed him. And then Tarzan of the Apes did just what his first ancestor would have done.

He took his woman in his arms and carried her into the jungle.

MGM (1934):

Frank Frazetta (c. 1970s):