Can kisses cause canker sores?

Really canker sores? Answered before on healthtap, canker sores are common aphthous ulcers of the surface of the mouth that occur situationally, often in response to stressors, are bacterial or viral, & can be treated topically w/many otc products that reduce local discomfort & potentially speed healing. However, a # of systemic diseases cause canker sore-like lesions--crohn's, behcet's, std (sexually transmitted).