Misconstrued Romanticism (3.5e Trait)
From D&D Wiki
This character interprets anything that anyone ever says to them as flirting. Flirting specifically with them.
Benefit: Any act of seduction or seducing spells have no affect as the character sees it all coming.
Drawback: -2 on Gather Information, and Sense Motive
Roleplaying Ideas: These characters may end up afraid of romance and traumatized of romantic relationships, thus feel like the entire world is conspiring against them.