You can bestow CON +3 when one of the following are equipped: Rabbit Ears, Raccoon Ears, Cat Ears, Lady's Hairpin, Party Mask, Monocle, Maiden's Hairpin, Forget-me-not Hairpin, Daisy Hairpin, Little Angel Wings, Fairy Antennae, Artisan's Goggles, Arrow-pierced Apple, Chapeau, Romantic Chapeau, Angel Circlet, Demon Circlet, Pirate's Eyepatch, Outlaw's Eyepatch, Eyepatch, Party Hat, Refined Angel Ring, Refined Devil Horn, Red Horns, or 9th Anniversary Rocket Gun Hat, Buff Helmet, Santa Hat, Blue Dynasty Circlet.