"So I just had an amazing idea."

Bruce jumped. He hadn't even realised Tony had entered the lab, wrapped up so much in his own work. "If this is about the Hulk again, I swear to God…" He warned, seeing that same determined look Tony only got on his face when he wanted something. "Is this a sex thing? This is a sex thing, isn't it?"

Tony looked surprised, but his expression soon flicked to a trademark smirk. "Well, it was about cool new tracker arrow designs, but you know what? Screw it. Let's just make it a sex thing."