There is a lot of rumpy pumpy in this episode.
Very much the kind of a young couple enjoying the experience for the very first time. I think it was captured rather well on screen. Not something that is easy to do. They were both sober, it was sensitive and Marianne initiated it.
For Connell there is still a contrast of being one of the lads and being in a relation with an unpopular flat chested woman.
This is the seed of discontent that comes to the fore when Marianne is insulted by one of his friend's. Connell does nothing about it.
What Connell does not quiet appreciate that his friends would be all over her if she showed any interest in them.
Marianne might have self loathing which can be normal for teenagers. She knows what she wants and Connell so far seems unsure.