Reconstruct a question, answer pair from this explanation: Protection in sex means things which prevent sexual fluid exchange. Sexual fluid exchange causes pregnancy. Not everyone having sex wants getting pregnant.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Q:what does having sex without protection lead to?
Options:
- sexually transmitted diseases
- making babies
- bliss
- aids
- unwanted pregnancy
A:unwanted pregnancy