I paid a girl to spit into my ex's drink
Why did you pay a girl to spit in your Ex's drink?
To tell the truth I didn't have any particular reason
Spitting into someone's drink is disgusting, you should not have paid a girl spit in your Ex's drink. You should move on from your Ex.
Oh shit! I feel some remorse now. Why did I act like that?
I'm glad to hear that you recognize that your actions were not good. Hopefully you will remember how you feel now and you won't do anything like that again in the future.