So, me and my boyfriend went to go see a movie and that's when we had our first kiss. I mean, we had pecked before that, but I mean legitimate passionate kissing with tongue and everything. We watched a little of the movie and obviously took breaks here and there, but we did spend a lot of time kissing. After the movie we were walking out and my lips (mostly the bottom one) was shaking or quivering and it wouldn't stop for a little bit. Is this normal?