Through the fourth and fifth seasons, Penny was still single and dating, however, it's evident she still loves Leonard, as she confesses drunkenly that she regrets breaking up with Leonard. In "The Ornithophobia Diffusion", Leonard and Penny go to the movies as friends. Leonard decides that since they are no longer dating, he can be honest and does not have to pay for everything or do whatever Penny wants. The two bicker all evening and sabotage each other's attempts to chat up people in the bar. They decide that "sex is off the table" for them. Penny admits that she likes the new, more assertive Leonard. So Leonard tells her that "Sex IS on the table".