Notice how the monk in red holds his arm, which is placed over his privates.
The lady appears to feel something pretty funny is going on.
Breasts, is that all it takes to distract you?
Her breasts, and her laughter, and her hair, and her collarbones, and her hands, and her aura...
I think that's the first part of the picture we all see first.
Is that why the hand of the one in red is "suppressing his emotions"?