From passage to passage, JAL describes a lot of sexually romantic situations between Oskar and Eli. Most telling is after Eli nommed Lacke. Both of them held each other sleeping. One can deduce they were dressed very little since it was written that they "got up and put on their clothes".
More so confirmed by JAL in the original Swedish commentary when he says that:
So here you have it. Two 12 year olds agreeing that sex should not be in this relationship of theirs even though the attraction is somewhat sexual. A sexual tension is present but also a maturity that is beyond their years is displayed.Oskar does have some thoughts to that direction but it never turns into anything.
To the extent he does, he gets to keep it to himself.
It's more because he knows that he should.
Even though Eli is essentially a child, guarding Oskar's emotional health seems to be on top of her mind. I will also draw on the earlier thread we had on the Oskar and Håkan parallel. Oskar like Håkan does not force it on Eli. Like Håkan, Oskar have to repress his sexual desires brought about by just the simple human process of growing up.
Eli refuses Håkan's requests for sexual intimacy when he bargains with her. Eli also initially rejects Oskar's proposal.
Difference? Eli let's Håkan go out and endanger himself. Eli is protecting Oskar's emotional health with that agreement for going steady.
The sexual nature of Eli's relationship with Håkan didn't bring clarity to Håkan at all. From his monologues, it was always the "demands and the desire". It was all physical needs with Håkan. The agreement between Oskar and Eli to keep the sexual element out of their relationship actually brought a lot of clarity to Oskar. There is this pressure that is lifted from him. OK why did I say clarity? Remember Eli offered to Oskar to "be like me?" Oskar refused! "I don't want to be like you, I want to be with you." And Eli understands. (cmfireflies likes this a lot) Quite like Twilight but in the opposite sense, the vampire is seduced by the mortal to give such an offer and the refusal is from the mortal.
Even though hand-holding, hugging and cuddling - all of which can be considered sexual in nature - were present in the novel, that first sleep-in scene has told Oskar directly that sex isn't an option and this means it is not just going to happen unexpectedly. From JAL's Swedish commentary, Oskar makes sure it is not going to happen. It's all courtship with Eli.
So this is where Oskar has success if you compared him with Håkan. Just for a simple act from Eli telling him flat out "let's keep this gross thing out"......
I try not to bash Twilight but I think here, LTROI is like Twilight. Except that Twilight used the vampire as a sexual being. The refusal by Edward to turn Bella is a metaphor for sexual abstinence. LTROI is far more effective presenting things as they are without using the metaphor of a vampire as a sexual being. What we actually read are two kindred souls who know that sex is going to bring about unwarranted complication in a relationship that is already complicated!

