Before revision: A close look into the behavior of Cornu aspersum shows that this is achieved not by the mechanical action of the dart as it penetrates the recipient's skin, but by the mucus that coats the dart: The mucus carries an allohormone that is transferred into the recipient’s hemolymph when the dart is inserted, which reconfigures the recipient's reproductive system: the bursa copulax (sperm digestion organ) becomes closed off, and the copulatory canal (leading to the sperm storage) is opened.
After revision: A close look into the behavior of Cornu aspersum shows that this is achieved not by the mechanical action of the dart as it penetrates the recipient's skin, but by the mucus that coats the dart: The mucus carries an allohormone that is transferred into the recipient’s hemolymph when the dart is inserted, which reconfigures the recipient's reproductive system: the bursa copulatrix (sperm digestion organ) becomes closed off, and the copulatory canal (leading to the sperm storage) is opened.