Announcement: The most popular fashionable contraception method nowadays: Spermicide.
Advantages: No side effects, easy to use.
Disadvantages: Not easy to purchase, high failure rate with each use.
Failure rate:意外 pregnancy rate within one year of using this method is 6-20%.
Coitus interruptus, external ejaculation.
Advantages: Convenient and cost-free.
Disadvantages: Requires strong self-control, not something everyone can achieve.