Board Thread:Questions and Answers/@comment-45001894-20200207174929/@comment-27045866-20200207180619

The shell you see in the picture isn't necessarily the shell they were born with as:

"They can solidify their egg white and make it like an egg shell, and should a man put up fierce resistance, they'll use that to bind him more strongly. Depending on the circumstances, they may cover all around themselves and their man with their shell."