Some of the others were convinced that this hat was possessed. Everytime Eridan was wearing it, he would be dear and sweet and precious and kind and affectionate and all that horseshit. But without the hat he would just be his normal self. To demonstrate this, you decided to take the hat off and put it back on to see how he would react.

take off

"i am goin to beat the shit out of you"

put on

"omg you are so attractive i lovve you swweetie"

take off

"die"

put on

"hehe youre so cute"

???