Even with Betty, though he had held her close, it was never this level of closeness. Tony seems determined to get in close in every inch he can- ah his fingers are cold! This only works at all because of their relatively similar heights.

He wants to protest, wants to run, yet even as he lays there, Tony going still against his back, Bruce takes stock of the situation and finds it surprisingly... quiet. No increased heart rate, no possible issues, only a quietness in his mind and body. Maybe it isn't so bad, then? He could try to sleep like this, with the octopus known as Tony Stark.