Inside the vagina. The sperm swim rapidly to the uterus through the cervix.
The answer is most likely than, it is because the poor does not acquire large sum of money where in they could use to ensure safety in terms of their health. Such as having enough money to have regular check ups, vaccines or medicine. They would likely spend the money that they acquire to food and shelter because it is more essential to them. That is why they are prone to have or acquire diseases than the affluent.
1. Eating whole foods (it is essential to keeping your gut microbiota happy)
2. Exercise
3. Good rest
4. Avoid drugs
How much you respect and like yourself
I believe its for nutrition.