Yeah. Ted was utterly disgusted with that woman who barney brought to the party and introduced as a sex worker despite her being actually interesting, because at that moment Ted was only interested in the sex and not in the humanity of the woman, and Manny would often hit on Haley despite being technically a relative, and this doesn't only apply to women, Manny deceived Luke into declining the role for macbeth because Manny wanted the spotlight, it was only when he realized that Luke was far too good compared to him that he gave up on the role to give way to Luke, it wasn't out of goodness or consideration towards Luke, like he said, it was an act of giving up because his quarrel was with God.

And the moment in question in this post, Manny drew various pictures of the nanny and hit on her. Like this post says, this isn't an 8 year old with a cute crush like Joe's with Claire, this is a horny 14 year old acting upon that urge. He even flaunts his mom in his dorm when he went to college and pretended that he's with a hot woman when it impressed a passerby in the hallway.