too-susceptible

This fortune-hunter has managed to worm himself into the intimacy of the marquis, and to kindle, in the too-susceptible breast of Madame Bouvalot, a tender flame, which he diligently fans.

Blackwood's Edinburgh Magazine, Volume 61, No. 379, May, 1847 Various

But perhaps it is better as it is; the picture might by some unlucky chance have fallen into the hands of some too-susceptible youth, who, like Don Sylvio de Rosalva, in Wieland's _Comical Romance_, would immediately have proceeded to travel through half the world to find the original of this enchanting portrait.

Visit to Iceland Ida Pfeiffer 1827