Quote from Robin in Benefits
Robin: Look, guys, we've got this covered, okay? No one's gonna get hurt. We set up ground rules. [flashback to Ted and Robin in the apartment:] Ted: Rule number one, this is strictly a physical relationship. There are no feelings involved, okay? Robin: Oh, please, that's like telling the Fonz to be cool. Ted: And since it's just physical, we don't have to worry about romance, right? Robin: Hell, no. Ooh, we can do it while we watch TV! Ted: Totally! And we can multi-task. You know, use the sex to spice up otherwise dull activities. Robin: Like folding laundry. Ted: Paying bills. Robin: Cooking dinner. Ted: That doesn't seem hygienic. Robin: Yeah, not that one.