In episode 25, Garnet and Diana have a serious Cat Fight with each other (getting down on the ground, clothes tearing and becoming wet; yeah, that kind of thing), in front of Dian.
Episode 32-A is full of this. First we have a baby Ruby kneading Kanon's chest and complaining that it's too small to have any milk. Then there's Iruka freaking out about every student suddenly having babies to take care of. Then Mikage also turns into a baby and Kanon freaks out about having to change his diaper and seeing you-know-what (complete with censor Angela!).
The ending sequence, Zutto Zutto Tomodachi, shows Blue Knight in a sexy pose and revealing outfit for the ladies' benefit. It'd be rather okay if the expression on his face didn't say "come hither".
Episode 5 opens with Garnet waking up in her bed with Blue Knight, naked, at her side. Garnet finds the whole thing scandalous.
In episode 8, Ruby instructs Pink to say nice things to the Deco Bus so it will travel a longer distance for them. Pink gets a little too into it and soon is rubbing a pole.
In some episodes, Coal disguises himself as a sexy woman named Coarumi to get Ruby's trust. He has these huge breasts which the camera constantly focuses on, and the fact that Io lusts after "her" is made no secret to the audience.
Episode 13 fired a Precision F-Strike. It's so hilariously bad it was intentionally bleeped in the broadcast and censored in the subs.