On a more general level, it does appear that same-sex relationships in the novels are not seen as any sort of heavily vilified taboo, but as expected, a venal sin roughly on par with adultery. Not much is known about the culture of Qohor in terms of sexuality and gender roles.
If a man penetrated another man anally, they were having sex. Big ones. In contrast, Medieval Europe did not recognize more than two genders: a biological male who behaved femininely was not seen as a legitimate, separate category of gender - he was simply seen as a defective kind of "male".
The competition was fierce. The TV version of Xaro dropped this aspect of his character. Ever since then, the Tigers have only ever held one triarch positon at a time, and sometimes none at all. Doran Martell 's heir in the novels is his daughter Arianne, not her younger brothers.
Therefore, these distant lands are half-legendary to men such as the maesters, and most of what they do know is based on sketchy accounts and unreliable rumors.