Sorry for the slightly X-rated question, I have an alien vixen, like a bounty hunter but her game is those rarest genomes for the sperm donation clinic, she can lure her males but the issue is about contamination, she cant let them know she is filling a container with their sperm so it has to be discrete but she knows she cant let them see any containers for the task.
So the question is: how much of her bodily fluids, her saliva or an ejaculation in her nether parts will contaminate or ruin her sample. As saliva and bodily fluids can break down sperm, how can she allow the normal love making process but still collect a viable sample? and what are her limitations or allowing other bodily fluids to be involved?
Assume she is of human DNA with human DNA being collected or something similar and not foreign with different chemical break downs.