One of the biological purposes of vaginal lubrication caused by sexual excitement is to

A) maximize exposure to infection.
B) create a more hospitable environment for sperm.
C) reduce the likelihood of pregnancy.
D) create a more acidic environment for sperm.

Vaginal lubrication caused by sexual excitement is designed to create a more hospitable environment for sperm, helping them to survive and swim more easily towards the egg. It also serves to enhance sexual pleasure and reduce discomfort or pain during intercourse.