Sentence:  The spermatophores begin to ejaculate immediately after leaving the penis and the whole process is completed in a very few seconds. Pulling the filament attached to the ejaculatory end of a spermatophore is all that is needed to start its <WSD>ejaculation</WSD>. 
Meaning of the word marked with <WSD> tags:  The act of ejecting or suddenly throwing, as a fluid from a duct or other body structure.