Post Haircut Bliss
Right after you get a haircut, when you're extremely happy and/or satisfied with it. Often followed by regret.
Person 1: OMG I can't believe how great my haircut is!
Person 2: Dude, it's just post haircut bliss. You'll feel different about it tomorrow.
Person 2: Dude, it's just post haircut bliss. You'll feel different about it tomorrow.