well, homosexuality is at least accepted in the Weyrs. I wouldn't say Ruth is a feminine name, though. come to think of it, I can't remember any other dragon names with a u in it. that might be faulty memory though.
Jaxom and Ruth... Okay Jaxom, born ceasarian after his mother died. Ruth also born alive through outside assistance when he couldn't crack his own egg. Shell too thick, and a membrane too thick to push through as well. as was made reference to in othe books, stillborn eggs were taken between and left there (by the weyrleader) so it was not unheard of, someone coming along and cracking open an egg, that was unheard of.
The society was described as rigid, but even then there was some fluidity. the only real line was that a dragonrider must stay in the Weyrs. this is the one rule that was broken for Jaxom and Ruth, mainly because the majority of humans felt that Ruth's days were numbered from the outset. Once that proved false the decision to not allow the pair into the fighting wings was implemented. This was the main point in TWD that was stressed. Jaxom was Lord Holder in name, since Lytol was Warder, Ruth was a dragon by birth and species, but was not any of the "traditional" colors for the species. as such he also did not mate, some felt it was because he would never mature to a specific gender. So Ruth is a dragon that defied all conventions. no Color to define him, no mating to define his gender, That taken away removed one of the times when a dragon's bestial urges took over a human nearly completely. He still ate messily, but hey can't have it all. Last was his memory, could speculate that since he was an anomolous creature having basically all the genetic code for the draconic species in him with no variation to seperate him into gold, brown, bronze, green, or blue, he might have kept the traits of dragons, but also have held some of the fire-lizard traits, with their racial memory etc... no actual information has come out of the stories, so its pretty hard to tell otherwise.
I will point out that on a number of occasions, the Here-and-Now memory touted to the dragons has been cast aside. with, say Mnementh, bringing up memories of things ten+ years in the past, his and F'lar's first solo flight, or Ramoth telling Lessa she will remember something til the end of her days. I dunno, Pern is still a great group to read, but rules bent or broken to tell a better yarn.