This happens a lot in EMS .. even nicknamed "extra marital sex". Unfortunately, we do work a lot of weird hours, placed in weird compromising situations, and see and deal with a lot of things the "normal" person cannot or does not understand.
However; I see a lot of behavior because it is promoted, or accepted that would never be allowed in other working environments. As well, many use above reason for excuses to have "affairs or relationships". I can truthfully say in my 29 years, I have only seen one or two of EMS relationships ever lasting. Even those one of the persons left EMS. EMT's are unfortunately labeled as such with good reasons. Again, I feel many use their job as an excuse for their behavior.
Relationships in EMS (with other EMT's) is very difficult, t (I know I had been married twice.. both medics from different agencies) talking shop and yes there appears to be some form of competition (just look at forums). If they are from the same service the difficulty increases. Every one will know if there is problems, breaking up, causes difficulties on related personal as well, even management. That is why I always recommend not to to have intra-office/ employee dating. Everyone pays for it...
For as an instructor, I tend to be strict on instructors. If they date after completion etc.... it is allowed, fraternizing with a student is automatic termination.
R/r 911