The sitcom 'Modern Family' is as warm and cozy a show as it is funny, and one of the main reasons for that is the relationship between Cam and Mitchell - one of the first gay relationships to be depicted on American television where the fact that the characters are gay isn't their most defining trait. Even though they're a big hit with the audience, one of the actors involved didn't feel comfortable with the part at first - Eric Stonestreet, who plays Cam, refused to do any kissing scenes in the first season.
By the second season he'd managed to reconcile himself with who the character was and how he's supposed to behave, and so kissing scenes started to find their way into the script. Even with that taken into account, Cam and Mitchell are nowhere near as openly affectionate as Phil and Claire, so there may be some lingering awkwardness.