Inclusion Criteria:  Health adults aged 18-40 years English-speaking only Not pregnant  Exclusion Criteria:  Health individuals under 18 years or over 40 years of age Non-English speaking Pregnant individuals Individuals on erectile dysfunction medications within the last 24 hours Heart rate <60 or >100 Systolic blood pressure <100 or >160 Subjects with visible open sores or wounds in mouth Subjects with severe environmental allergies requiring medication as well as subjects with allergies to medications Subjects taking nitrates or vasodilating medications Lactose intolerant or allergy to dairy products.