When Dido had come bounding over to him Bruce's lips had pulled into a full blown smile and he had very easily greeted the exuberant creature. "Hey you," he said with warmth in his voice as his hands worked over her ears and he let her lick him as much as she wanted him. By the time Valkyrie appeared Bruce was crouched on the ground with Dido rolling around at his feet, seemingly much more relaxed now than he had been a moment ago because he was certain that if there was danger than Dido wouldn't be quite so bouncy.
Of course it wasn't until he looked up that he realised Valkyrie wasn't quite as clothed as he was used to seeing her and he immediately flushed with colour because he wasn't the smoothest guy out there. Exact opposite in fact, but then he was a nerd, a smart man, but a nerd all the same. "Uh, hi, sorry I didn't mean to interrupt-" his voice trailed off because what might he have been interrupting that meant that she wasn't fully dressed.
Probably best not to ask.
"Sorry, let me try this again," he said with a shake of his head as he rubbed Dido's head. "How are you?"