I may have an avocation as a sex therapist, in the line of Dr. Ruth (I always have done a really good impression of her ) People are always asking me questions. I have stopped being surprised. There's no judgment here. No matter how much experience people have, they still have hangups and misconceptions. A lot of those are set early, though, by peers, parents and society.
I just had a gentle but honest conversation with a young man who asked me if I thought giving another man oral made him bisexual. I said, no behavior makes you anything; it's who you are attracted to sexually that defines you. Curious exploration is normal. It's better to listen to your gut, see what resonates for you, ignore what other people say, and trust that you know yourself best. Whatever you choose to define yourself as, if you choose to define yourself at all, is your business alone. Labels are ultimately meaningless to human attraction.