He wasn't planning on this happening, but now that it has? It might be a bad idea to keep it up, but the only reasons he can find for that are... well, stupid, or tangled up in fear. He has a heavy hangover from orgasms generally, so he lets himself be guided back easily, waiting for his body to resettle and his mind to clear. Once he has the sense of mind, he pulls Tony closer; if they're going to do the intimacy thing even when they aren't having sex, chances are much higher that there's going to be a second time.

"Yeah, but you tend to say that about me all the time." He exhales slowly, his eyes closed, as he visibly relaxes further. "Can we stay like this for a while? Are you comfortable?"

After sex, Bruce usually either needs sleep or food, and right now he'd much rather lay here with Tony.