Bhima is silly putty in Draupadi's hands. Of all her husbands, he is the one who loves her the most. He fulfills her every request, he cannot bear to see her hurt.
Who brings her flowers from Kuber's garden? Bhima. Who cries because his beautiful wife will have to serve as a Sairandhri (maid) to Queen Sudeshna of Matsya? Bhima. Who kills a 100 Kauravas to avenge the insult to Draupadi? Bhima. Who does Draupadi run to when she is molested by Keechak in Matsya kingdom? Bhima.
The other Pandavas are not under Draupadi's thumb. She is prone to outbursts of rage, she makes unreasonable, unwise demands. When she wants Keechak killed for molesting her, Yudhisthir tells her that it would expose their presence in Matsya kingdom, and advises her to "live with it". (Model husband that). Bhima simply walks up to Keechak in the middle of the night and tears him limb from limb. No questions asked.[7]
Draupadi shows us Bhima's human side. He is a savage monster with others, but he is always and only tender when it comes to Draupadi.
Source: www.quora.com