Magical dreams
Podrick had fancied Lord Tyrion ever since he first became his squire. He was embarrassed about it, but he just couldn't help himself. He just wanted Tyrion.
He was heartbroken at first when Tyrion gave him money to go to the whores. He supposed he had to do his duty. To hone his skills, after all, he might have use of them later. Sure he was attracted to girls too, but he mostly fancied Lord Tyrion.
He smiled as he brought the money back. And the man was surprised. Especially since he was giving money back meant that the whore his Lord had thought he'd paid for hadn't been paid at all. Let him wonder about that. Perhaps he would become interested in him as well.
But alas. after that Tyrion sent him away with Brienne to look for the Stark girls. Apparently he was no longer interested in his abilities as a squire. He didn't want to leave Tyrion. He still needed him and there was no doubt in his mind Tyrion still needed him too. But he did everything to please lord Tyrion… even if it was to squire for Lady Brienne. Not that she liked to be called a lady.
He grew fond of being her squire, but she wasn't like Lord Tyrion. And he had no interest in her whatsoever. It didn't bother him.
While on the road he lay awake many a night, thinking about how good it would feel to be with Tyrion, really be with him. Like Lord Renly had reportedly been with Ser Loras. So he masturbated thinking about his lord back in King's Landing. He thought he'd never see him again. It was sad, but as long as he was happy, he could be happy too.
Only when he finally met Tyrion again in King's Landing, Bronn was the only one to see the truth.
"You can suck his magic cock later," Bronn had said. Oh, how he wished he might do that. He went out drinking with Bronn talking and drinking.
That night he lay in his bed, waste. He had the most wonderful dream. In his dream, Tyrion sucked his cock and vice versa. 'This is just one more beautiful dream,' he thought.
When he woke up the next morning he was lying naked in bed, next to Lord Tyrion with Bronn watching from the doorway with a big grin on his face and a large bag of coins in his hands.