Frasier trumps Niles' "seven" (women he's slept with) with "eleven". At first glance it may seem like simple one-upmanship (Niles certainly thinks so), but even we the audience know that up to this point Frasier has slept with at least seven: his piano teacher (Clarice), Nanny G, Lilith, Diane Chambers, Bebe Glazer, Madeleine Marshall and Kate Costas. If we know of seven, then eleven doesn't seem all that far-fetched.
David Duchovny who played the guest caller in this episode who claims that he and his partner are sexually insatiable for each other. In 2008 Duchovny would admit to being a sexual addict.
This episode contains a rare example of product placement on Frasier. At Frasier's apartment, Roz says she's going to get a Coke, and then goes into the kitchen and takes a can of Coca-Cola from the fridge, opens it and sips from it. This was the third season of Frasier and the series was becoming popular enough for such things to occur. In subsequent seasons, however, you see no more of it, so apparently the producers decided it wasn't right for the show. The only other products we ever see mentioned specifically, such as BMW, Mercedes, M&M's and Balantine, were integral to the stories/characters and it's unlikely they were product placements.
Despite the episode ending with Roz still thinking that Frasier has deep feelings for her, the incident is never mentioned on the show again.
Martin: Okay then I'll tell you the truth. My indian heritage forbids it. (he places two tulips behind his head) I'm afraid your magic box will rob me of my spirit.
Frasier: Well do you want me to answer as a friend or a therapist?
Roz: As a friend.
Frasier: See a therapist.
Roz: Niles called from the airport, he wants you to call him back. He sounded frantic.
Frasier: I'll call him from the car. He's flying to a conference in Switzerland. I promised to talk him through it.
Roz: Surely he's flown before?
Frasier: Well, not coach.
Episode Title: Frasier Loves Roz
This alludes to the 1982 television series, Joanie Loves Chachi, a spin-off of the popular 1974 series, Happy Days.