In short, Tu B'Av is the Rabbinic Valentine's Day, which comes after Tisha B'Av (the fast of the fifth month, after Tzom HaChodesh Tammuz—not, as it formerly was, for the "god" [dybuk] Tammuz), and before Yom Kippur and Asara b'Tevet). The rabbis decided that after two months with fasts and before Yom Kippur, a yom l'simcha was needed—including for, I suppose, pets and their feeling-much-better-after-breaking-the-fast owners—of course, making pets fast would be wrong.
As on Valentine's Day, the theme on Tu B'Av is ahavah (love)—of which there are different kinds, with three words for the main kinds in Biblical Hebrew, including "ahavah". Puppies—including adult puppies (dogs) like Reilly and Camille—show ahavah, including for each other and for their masters—and masters' families!
Reilly and Camille, yesh lahen ahavah l'echad achar—after all, e.g., to clean out each other's ears takes ahavah rabah v'g'dolah.
As on Valentine's Day, the theme on Tu B'Av is ahavah (love)—of which there are different kinds, with three words for the main kinds in Biblical Hebrew, including "ahavah". Puppies—including adult puppies (dogs) like Reilly and Camille—show ahavah, including for each other and for their masters—and masters' families!
Reilly and Camille, yesh lahen ahavah l'echad achar—after all, e.g., to clean out each other's ears takes ahavah rabah v'g'dolah.
So does playing as roughly as Reilly and Camille do!
So does napping together and (and as demonstrated with close ups included) inadvertently forming a heart shape and sleeping side by side!