The Winter Soldier never had anything sweet. He wasn't allowed to. So yes - Tony finds that putting a lollipop in Winters mouth makes him go from angry-angsty mess to grinning-happy-place fluffball in under 10 seconds. There is a lollipop-protocol now and Tony loves to see the officials cringe about it. Also: Natasha is an evil Nimm2-Lolli carrying enabler.