Do I ume my boyfriend is bi-ual, gay, confused orpossibly not even figured his uality outcompletley?

My boyfriend who is 30 yrs. old, openly offered info. about when he was 21 yrs. old and let a male friend go down on him. He told me that this was the only behavior between the 2 of them and it was a 1 time deal. This worried me a bit but I let it go, I figured maybe he was curious and experimenting. I completly trust his loyalty to me as well as his honesty & openess. But then 8 mo. later we both went to a comedy club where we both were hypnotized on stage. The hypnotist/comedian put a pretend in front of the mens faces that were on-stage to see what each man would do. Some men turned away, some couldnt turn away fast enough, one man rubbed his face against it. My boyfriend had first turned his head away from the '', then decided to lick it instead.When put into hypothetical ual situations on stage with women he was very much attracted 2. He tells me that he is not gay but will not deny being bi-ual. I have tried talking to him about this b-4 but was unsuccessful.