Or if they just stayed home and jerked off.
They are predators.
Time Machines can solve this....
20 year old Woman goes into an abortion clinic and asks for an abortion....
She disappears all of a sudden
20 years and 9 months ago her mother wonders what happened as one minute she is pregnant and the next moment she is not...
The 20 year old skank just aborted herself from the timeline....
And in the “Temporal Abortion Clinic” someone prepares to send another dose of Plan-B back in time for their next client....