What happens after making friends with someone of the opposite sex?
Options:
- falling in love
- smile
- talking
- shake hands
- punch in the face
Let's think carefully first. Step-by-step reasoning process:

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
People generally fall in love with opposite se. So the final answer is falling in love.