This is THE MOST BIZAARE story I have ever heard; a man that is insecure over his wife's OBGYN?
First off, NO WOMAN LIKES going to a gynecologist. I don't give one flying fahootie how "hot" YOU think the doc is. There is NOTHING sexually arousing or gratifying having to lay on a cold hard table with your feet in stirrups "letting your knees fall to the outside" well some dude (or broad) shoves metal instruments, swabs or gloved K-Y'ed fingers in your coochie... NOTHING. For you to think that there is *something going on* from this I have to say that there is something seriously amiss in your marriage.
I have gone to both male and female and honestly, I don't care as long as the DOCTOR is competent and I feel comfortable. If my husband ever DEMANDED that I see another doc because he had some bizaare notion in his head about "what was going on" I would show him the door... PERIOD.