How long was your first kiss? What kind of experience is it?

Speaking of the first kiss, it's actually quite funny. At that time, I was not sure about my relationship with my boyfriend. I sent him to catch the train, and there were 10 more minutes. He hugged me at the entrance and kissed me on the cheek, but I kissed him, thinking that the train was about to leave. I pushed him away in two minutes, and then said, go, go without looking back.