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

Alright my answer will be of a sexual nature so be aware.
Male:
Semen have sperm that travels into the vagina and into the uterus. Only one lucky sperm will be able to find an egg. Or two eggs, and two sperm. The man ejaculates during sexual intercourse and that is basically how a baby is made.

Female:
The vagina provides lubricants of sexual intercourse when the female is aroused. This makes it easier for the penis to go inside the vagina.

Another thing the female reproductive system produces is discharge. It is the body’s way of cleaning itself.

Another thing is periods. Alright this is a gross description. Every month, the uterus makes a lining, which is a soft cushioning for a baby to grow. A girl has a period because a sperm doesn’t fertilize an egg. So the body removes the lining. Alright, gross part. It sheds off the lining (can be painful) and goes out of the vagina. Thus, a period.

Hope this helps! :)