Last year, my colleagues and I were traveling from DXB to AMM. I was in F, while 2 other colleagues, Skyward Blue, (male and female) were in Y.
We were all staying in the same hotel, so I asked for transportation to DXB airport, as one of the perks of F travel (there were some issues, but after some convincing with the driver, he agreed, but insisted maybe 10 times that he will get into so much trouble)
We get to the F class counter, and the agent insisted that I could only check-in, and the remainder had to check in with the masses. So, we did that.
We get to the F class lounge not too sure if we could all enter. First attempt successful with me + 2 Y passengers who were Skywards Blue. About 30 minutes after, I see the person let us in, call me towards him so I went, and he said quietly "rules do not allow me to permit non-F, or non-Gold passengers into the lounge, but the girl is really beautiful, and I let all of you in, because I cannot deny access to a beauty like that. You are so lucky, and to reward all of you, I have put your names to be upgraded to F".
We get to the gate, and we all travel in F.
Sometimes outer beauty helps you get into lounges and upgrades, even when rules do not permit....sad, but true