 She traveled to San Francisco and began dating a lot, using Internet dating services and apps, and sometimes going to singles' bars alone, only to find that the "romantic-comedy concept of love" with a "perfect, permanent, tea-for-two ending" was not going to happen to her.There is evidence that couples differ in the pace and timing with which they initiate sex in their relationships.Studies show that approximately 50% of premarital young adult couples become sexually involved within the first month of dating, while 25% initiate sex one to three months after beginning to date and a small proportion of couples wait until marriage before initiating sexual relations.