Final answer:
Daisy's lack of vaginal changes could indicate a condition called vaginismus, making sexual intercourse difficult or impossible.
Step-by-step explanation:
In the context of sexual development in females, the vaginal changes that precede sexual intercourse typically include lubrication and relaxation of vaginal muscles. If Daisy is extremely interested in sex but does not experience these changes, it may indicate a condition called vaginismus. Vaginismus is a condition where the muscles around the vagina involuntarily tighten, making vaginal penetration difficult or impossible. It can be caused by physical or psychological factors and may require medical or therapeutic intervention.