system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is the role of a female orgasm during reproduction?

I've always wondered but never really understood if the male sperm is in any way helped by a females orgasm and vise versa. I know its a cheeky question, but would like to understand that like I am 5 cause I really dont understand it.
gpt
A couple possible theories but nothing proven. 
1. Helps increase uptake of sperms into the uterus. 
2. Helps increase probability of male orgasm to increase chance of conception. 
3. Just a byproduct of a 2 gendered species. Just like how the male nipple is practically useless, the female orgasm might just be the pairing of the male orgasm and has no practical use.