I believe you're implying is that a gynecological exam is somehow a sexual thing when it comes to straight, male OBGYNs. I can definitively say it is not. Contrary to what a porn may show you, OBGYNs, including male OBGYNs, are very respectful, professional, and cognizant of the patients' comfort during exams. I've had male gynecologists and it was absolutely never sexual. I am also guessing you're male, or at least a very young AFAB person, or you would know that gynecological exams aren't really arousing for most people, doctors and patients alike. I mean have you ever seen a speculum? They aren't fun.

Many AFAB people prefer to have a female OBGYN, but that doesn't necessarily mean it's because they think they'll have their consent violated somehow by a male OBGYN. It's just a preference.