Absolutely. Experimented when young with male cousin, Never considered ourselves bi or gay. simply interested in exploring what our cocks were capable of feeling and making the other one feel. In South Am, we had access to european porn which had bi scenes in every page or video scene. So to us, it was pretty normal that sex was not just heterosexual. To the point, I found it weird that rest of my friends at school only discussed and approved of hetero sex.
Years later, my 1st wife actually turned me into a cuck. Did it in such a loving and natural way that I never ever felt a twang of jealousy as she went on her romps with other guys her age. I was 6 years younger than her. I was the perfect age to be groomed (21) so she groomed me to explore my own cum, play with it and then explore the cum of her lovers in her pussy.
I mentally associated drinking cum from her with my chance to fuck her. Talk about Pavlov and his dogs! So she reinforced my early paradigm that it was perfectly natural to admire and discuss other cocks.
We never got to finding me a realy bi buy to fuck my ass but had I remained with her, I think she would have