Love darts

Love dart is apparently not as romantic as is sounds. You can read more about this in these two articles:

The love-darts of land snails: integrating physiology, morphology and behaviour

By Monica Lodi, and Joris M. Koene

https://academic.oup.com/mollus/article/82/1/1/2460173

A Syringe-Like Love Dart Injects Male Accessory Gland Products in a Tropical Hermaphrodite

By Joris M. Koene, Thor-Seng Liew, Kora Montagne-Wajer,  and Menno Schilthuizen

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3722094/

(Last accessed 16.03.2021)