A “tween” is defined as between ages 10-12 by the way.
I have a tween daughter and that is not a conversation I would have with her, unless I was a pedeophile.
Ten to twelve year old boys are often still in the “girls are icky, but I like how they look” phase. So you get a push and pull and rebound “I like them, I hate them, should I kiss her or push her to prove I’m a boy?”
A tween doesn’t have a sufficiently developed mind to appreciate the import of the “gay” label, except that he does like and maybe even love his close friends as brothers. And he isn’t sufficiently developed sexually to know whether he likes girls. And he isn’t sufficiently experienced with girls if the hormones have kicked in to be anything but awkward.
In short, an 18 year old who says “girls a lower sexual appeal than a truck” probably knows what turns him on and what doesn’t.
A 12 year old can’t. But parents labeling him and then pushing him in that direction will create a self-fulfilling prophecy from which he won’t escape.