 Larger males tend to engage in more tapping sequences and have higher fertilization success, either due to their size or due to female preference for large males.During copulation, male sperm is deposited into a storage organ called the bursa copulatrix.Sperm from previous matings is mostly stored in doublet storage tubes called spermathecae, while sperm from the most recent mating is typically in a separate singlet spermatheca.