Lost Girl got super freaky when Bo entered Dyson's memory and she envisioned their friends in his past.
With Dyson's life on the line, Bo decided that the only way to clear his name was to witness the truth from his memories. The experience ended up providing insight into who Dyson used to be.
At the beginning of Lost Girl Season 4 Episode 7, the journey into Dyson's mind and his past was intriguing, but it quickly turned into something I wish I never saw. The sexual aspect of the episode played like what I'd expect to read in fan fiction and not on the show. The twisted threesome between Bo, Lauren and Dyson was unnecessary.