Sooner or later, Yaniv is going attempt to lose his virginity the only way he knows how: By making an inept pass at a blatantly-underage teenage girl in a public toilet. Fortunately for his victim, Jonathan is so lumbering and inept, that he will be easily repelled. He will attempt to pass off the incident as a transphobic attack. A conviction for a low-level sexual assault on a minor, and a spell on the sexual offenders register, loom large on his horizon.
Unless there is something sexually untoward going on between Jonathan and his mother (as some have speculated) or Russell Greer significantly lowers his standard of dating partner to a more realistic level, Jonathan will never have consensual sex with anyone.