SHOW: Here is a loving, committed couple in a healthy marriage who have established good communication skills and repeatedly demonstrate how much they respect and love one another.
SHOW: Oh also there is this dorky character obviously very fond of the wife and at ease with the husband, but don’t worry about him, he mostly serves as a vehicle for exposition.
ME: ……yeah but what if he had sex with them
SHOW: No, that’s not–
ME: what if he were horrifically and painfully in love with them, but felt he couldn’t say anything because he’d never break up their marriage, and canonically he’s likely to deflect any expression of honest emotion with a jibe so he could easily be avoiding the subject of how much he cares about them and wants to be a part of their lives