I wouldn't.
Me neither. The only time i felt sorry for them was when i was on the ocean and i was catching blues. I went out with a guide and every fish we pulled in he cut it open and ripped out the guts and the heart. My guide had a liking of ripping out the heart and holding the still beating heart in his hand. Poor fish.
back on topic, I don't think they feel much pain in the lip but i think it would hurt if someone did what my guide did.
Make sure to kill fish humanely with a priest and not carving it up.