Part 1, Playing With Fire
The problem with being close to someone like Tony Stark is it's so easy to forget that the man is so much more than the arrogant asshole he comes off as to everyone. Tony is brilliant when it comes to engineering and he's a master of manipulating words to get people to do what he wants, not too much unlike the trickster that caused them all to be brought together. He'd been hurt too though, he'd had a father that focused so much on grabbing the world and wrapping up up for his son that he'd completely missed him growing up and into the young man that would own the empire he was trying to create. So Tony knows all about self hate and disappointment, he drinks and plays around to keep the hate at bay and after a few of his drinks he's more than willing to share his secret to forgetting for a while how awful he really is.
Bruce groans low in his throat as a sudden wet slurp breaks the silence and Tony pulls up and off the scientist's prick, his eyes glinting and his lips slightly swollen from slow steady sucking. It's dangerous and both of them know it, should Bruce's heart rate spike too much or too much adrenaline be released Tony would be helpless against the raging Hulk not that the danger is going to stop either of them at this point. Because Tony needed the edge of danger to distract him just as badly as Bruce needed the pleasure to haze his perpetually busy mind.
Part 2, Delicate
There was nothing delicate about Loki, sure he wasn't cords of thick muscles like most of the men of Asgard but he was far from the teasing of fair and breakable. No Loki was all lean muscle and quick wit, he might not have faired well in a head on fight but when it came to strategy he was almost unbeatable, and Loki seemed to have a plan for every situation. So no Thor didn't think his younger brother was delicate but he still felt that Loki was in need of his protection. It was a sharp stir of emotion really, a feeling he couldn't quite place, that spurred him to protect Loki and it had all started with a single bruise.
Thor would never forget the dark molted bruise that had covered the entirety of his brother's shoulder and almost dripped down his pale back. He'd always remember the way Loki had struggled for a few humiliating seconds to gather his books up in the library and the way he carefully ate with his non-dominate hand to avoid any spills. Mostly though Thor remembered the way Loki had turned up his nose and scolded Thor when he finally lashed out at the guard that had wronged his brother, never-mind that his eyes had glittered with grateful emotion the entire time he scolded Thor for being so hotheaded.
Now though there was only hate and spite in his beloved younger brother's eyes even as a dark bruise seemed to creep across the trickster's left cheek. Still clutching Iron Man's arm Thor stared at the bruise and felt the same sharp stir of emotion, though now he was fairly certain he understood what he was feeling.
"Brother."
"I am not your brother Thor."
No, no had he been than Thor would have been able to protect him like a big brother was supposed to; how dare he try to call Loki that when he had failed him so greatly.