He stares at Clint, but in a way that's more assessing and speculative than shocked or horrified, and not because he's going for that.

"You want pain and to bleed, we'll work it out and I'll feel good about it - probably even enjoy it, but I'm not 'taking my anger out' on anybody but Thanos." Too dangerous, too uncontrolled, too close to being someone he absolutely is not going to be.

And no, there's not a single hint of being embarrassed, uncomfortable, judgemental or upset in saying any of that.