When it comes to being pregnant, it seems your body instinctively knows what you like to eat. Experts are not sure how this can happen but it seems your body has natural protective mechanisms; certain foods are not good for the developing baby so your body turns you away from them; or your body is deficient in certain nutrients, so craves foods that will provide them.
Suddenly you can't stand the thought of food and drinks that you have always loved and find yourself craving things you never previously liked, or you long for bizarre combinations of foods. Aversions and cravings are often associated with nausea. It's common to be turned off by fatty foods since the smell alone can make you feel sick. You may start to dislike the taste or the smell of coffee or tea, cigarettes, and alcohol.
It is common to crave strong-tasting foods such as pickles, which may be due to the fact your taste buds change during pregnancy. What's termed "pica" is an unhealthy craving for bizarre items (see as a matter of fact).
You should try to eat healthily, but there are a few foods which should be avoided (see What to avoid). Otherwise eat whatever combinations you desire-and don't worry about the strange looks you might get in the sandwich shop!