YMMV / Buffy the Vampire Slayer S2E14 "Innocence"
Fridge Logic: So, no part of a explosive rocket or bazooka is manufactured through "heating and hammering"? Television Without Pity takes their word for it.
I don't think it's the "forged" that's the important part—it's more like "no weapon YET forged can kill him." That's why Buffy says "that was then—this is now." Times have changed.
Fridge Brilliance: More than a few fans and critics have questioned why the Romani clan would create a spell with a "perfect happiness" loophole. But it's never said that they did this deliberately, it could simply be the way magic works. When you've got spells lasting for eternity or that affect people over generations, the Universe or the Powers That Be would need a safety valve or the whole world would be full of cursed people. Alternatively, you could take it as the Kalderash being so obsessed with vengance that, instead of allowing the cursed Angel to have any respite from his torment, they considered it better to end the curse if he did achieve happiness than allow him to continue living with some form of comfort.
Hilarious in Hindsight: Spike taunting Angel about how his love for Buffy turned him into her lapdog. Spike eventually falls for Buffy himself, only to end up the "whipping boy" for all her unresolved Angel angst.