A comedy show might not seem like the ideal place to solicit relationship advice, but Sunday night at Park West — which is the most romantically inclined of Chicago’s comedy venues, if anyone’s tracking that — two couples made their way to the stage and received a few tips (and a lot of teasing) from comedians (and married couple) Natasha Leggero and Moshe Kasher. Leggero (“Another Period,” “Dice”) and Kasher (“Problematic with Moshe Kasher”) were stopping in Chicago for the penultimate show of their nine-stop “Endless Honeymoon” tour to deliver stand-up sets (separately) and opine about love (together). “We’ve been married for a year and a half, which pretty much makes us relationship experts,” Leggero declared. Besides, how bad could it be to get help from a comedic couple in front of a live audience? “The worst thing that can happen is that you will be mocked by a couple of professional mockers while hundreds of strangers film it on their iPhones,” Kasher warned before bringing couples to the stage. While the advice itself was much more lackluster than the mockery — in both cases the wisdom the couple passed on was borderline dismissive while the one-liners and jabs were consistently sharp — the premise itself is a solid one. The couples’ therapy comedy structure not only plays into the self-centered indulgence of audience members looking for the limelight, it creates an opportunity for reality show voyeurism for everyone else. It also highlights the relative rarity of a comedic couple with equally sharp chops sharing a stage. Married stand-up comics touring together are not particularly common, leaving Kasher and Leggero in rare contemporary company. Former Chicagoan Cameron Esposito and her wife, Rhea Butcher, do it (they’ll be back in Chicago at the Vic in October), while Nick Offerman and Megan Mullally toured a variety show (“Summer of 69: No Apostrophe”) in 2015 that ended up on Epix as a comedy special earlier this year. Leggero and Kasher are both accomplished comedians in their own right, and they benefit from having their styles juxtaposed against one another. Leggero’s sensibilities lean dark, deadpan and ironic (“It’s hard being a man, right?” she