Thats your Headcanon, sorry
Luffy and Zoro being straight is your headcanon.
Nami flashed the strawhats two times, both time Zoro was missing or barely reacted. When Boa stops the Navy ship, every male except Luffy and Zoro were visibly affected by her beauty. In Wano when Hiyori did her Oiran procession, Sanji, Brook and Franky were starstruck by her beauty while Zoro didn't react to her when he met her. And everyone knows about Luffy not being attracted to Boa's beauty.