Supposedly oral sex does. The hormones released by orgasms combat the ones that cause nausea. Or at least that was the line my husband used, ha. I had average sickness, so I can't say if it worked or not.
my doc gave me diclegis zofran reglan and finally phenegrin helped try light foods and sprite also peppermint and ginger may e preggie pops but no lol sex wont help