Urban Dictionary: Sexual Bases How would you describe the 4 bases of dating in the context Definitions of bases and I m not talking baseball Go Ask Alice! 1st Base - Is, kissing, french, open mouth or just a peck. Essentially going down on a guy or girl. Also This base includes the sex toys. The four bases in a relationship, like in baseball, where the partners try to get home. Four bases of American dating : F1 - French, kissing : First base. The Gender of Sexuality - Side 93 - Resultat for Google Books Do Japanese people kiss on the first date? Practices Among the Uncommitted There is a direct relationship between. About getting to first base ( kissing ) before they had a home run (intercourse). Among American adolescents, baseball metaphors for sex are often used as euphemisms for the degree of physical intimacy achieved in sexual encounters or relationships.