Question from my girlfriend: are there dudes that won't let their girlfriend see a gynecologist.

Me and my girlfriend have been in some toxic relationships so we joke a lot about over controlling men. Well my gf has to go to a gynecologist and we were joking about insecure dudes. In the joke the immature guy wouldn't let his girl go. But we were wondering if thats a real thing and if anyone has heard or experienced this. Or if it really is just our cartoonish exaggeration of toxic dudes.