1) Nik and Justin basically do not talk about them having sex, ever, including while they're having it.
2) Justin loves Nik. He doesn't say this either.
3) Justin is reasonably good at reading Nik's moods in absence of speech. The converse is less true.
4) They are generally equal partners in bed, but Justin is the more assertive of the two, and on some occasions plays at dominating Nik, with Nik's implicit consent. (This detail comes up in tomorrow's entry, but I figure I may as well throw it in now.)