Chewing gum is like a lover

You crave the taste. It's good and refreshing in the beginning. Eventually it becomes dull and you spit it out. Grab for the next stick and start over again.

As for a blowing a bubble...
Gum: You chew and chew once you get a rhythm going you get the urge to stick your tongue in the middle of the gum and blow. Seeing the bubble get bigger and bigger, then it pops all over your face.
Lover: Instead of chewing, you lick and get a rhythm going. Feeling it throb and you get an urge to get him aroused. It gets harder and harder, building inside and then it shoots up all over your face.