The other day I experienced two distinct but similar events. I wanted to convey this to a friend and this is what came to mind: "I was kissed by a girl twice." My question is, does this sentence say, "I was kissed by the same girl twice," or "I was kissed by two different girls on two separate occasions?"
Similarly, what's the proper interpretation of this sentence: "He got hit by a bicycle twice yesterday." (Was he hit by the same bike twice?)