Play with - prepare to get burnt.
Irrespective of the other reasons mentioned, no-one has mentioned the potential for blackmail, no major secrets in RAFAT maybe, but with the claws in, wait until in an operational role, especially as wg cdr / gp capt.
There once was a junior officer, in his “second single” days who met a rather attractive young lady at a local pub; they had a great time & agreed to meet up again. Next date, things went swimmingly, but crucial to the story, neither party had mentioned their job circumstances. After the second date, there was clear agreement to have more than a drink, so back to the (as yet) unknown junior officer’s accommodation, with some explanatory words that it was going to be a military establishment, the Officers’ Mess in fact. The young lady’s eyes were a bit wider than perhaps expected…
Next day, the junior officer (a gentleman of course) offered to take the young lady home. No need, she explained, I can walk - I live 200 yds away in the block. Ah, b*gger, end of that then. What a shame, such a gorgeous cpl.
At the same time, there was a female junior officer who had a (very, very discrete) relationship with, & eventually married, a sgt. Career went very cold, she left the RAF.
Knew several people, started relationship, officer / air person, wallop, instant posting for one of them.
Shortly after I left Bruggen, OC Ops started an affair with deputy Sqn Ldr Op’s wife; was caught “flagrante delicto” playing a different type of squash in the Officer’s Mess squash court. He was hit under QR1021, confined to his quarter for 2 weeks as he had to finish off all the OJARs, then had to clear the unit getting his signatures himself, no Ops cpl being lumbered. Back to UK in disgrace.