I wish this show existed when I was a teen, but even watching as what might arguably be termed a grown adult, this has proven both educational (filling in a lot of gaps where pretty much nobody ever told me what was going on) and deeply entertaining.
For a show that makes a lot of dick jokes there's an awful lot of actual depth and imagination here too, and it's really interesting to watch these kids grow up and guess at what paths they seem to be going down.
It's liberating to see media that talks and jokes about puberty, hormones, sexuality and all that self-discovery stuff without being kind of ashamed of itself. Big Mouth knows exactly what it is and what it's trying to do, and sends the clear message that this is stuff we should be talking about.
Having just finished off season 2 for the second time I also feel like this is prepping to go farther in season 3- I think one character just came out as bisexual, and I think we're setting up for some discussion of what it means to be transgender.