Here’s another thing that hasn't been mentioned yet. In some women senses become extremely acute during pregnancy. The smell of bacon, or putting mayonnaise on my husband's sandwiches made me throw up during my first pregnancy. In other pregnancies (I had four) there were things I didn't dare eat. This isn't to say that the other things suggested to you before are wrong, but just maybe you weren't as sensitive to the smell of your husband's semen before the pregnancy as you are now.