Pussy Eating?

Don't get me wrong, Mrs. G and I have been married for 30 years and I love her dearly. A common complaint I often hear from guy's is that their woman doesn't like/won't give them a blowjob. Mrs. G and I are in an opposite situation - she loves to give blowjobs and will suck my cock anytime, any where but she doesn't like me to eat her out. Before meeting Mrs. G, I had several long term relationships and all my previous partners enjoyed my oral abilities and frequently requested that I go down on them as foreplay or to clean them up after I shot my load into them. I never failed to bring any of them to orgasm (or multiple ones) through oral. On the other hand, I have to beg Mrs. G to let me eat her pussy. It's not just me she says, she has never liked anyone to eat her out. It is something that has puzzled me for a long time.

Anyone else out there run in to this before?