Which organs of the male and female reproductive systems secrete fluids that act on the vagina?

In the male reproductive system, the prostate gland and seminal vesicles secrete fluids that contribute to semen, which can act on the vagina during sexual intercourse. These fluids help to nourish and transport sperm.

In the female reproductive system, the Bartholin's glands and Skene's glands (also known as the lesser vestibular glands and the paraurethral glands, respectively) secrete fluids that can act on the vagina. The Bartholin's glands produce a mucus secretion that lubricates the vagina. The Skene's glands, located on the upper wall of the vagina near the lower end of the urethra, secrete fluid that is thought to be involved in female ejaculation.