From the book apparently (I found this on ASOIAF wiki) concerning Rhaenyra’s betrothal to Laenor:
“One objection was raised: Laenor Velaryon was now nineteen years of age yet had never shown any interest in women. Instead he surrounded himself with handsome squires of his own age and was said to prefer their company. But
Grand Maester Mellos dismissed this concern out of hand. "What of it?" he is supposed to have said. "I am not fond of fish, but when fish is served, I eat it." Thus was the match decided.”
LOL. Fish. Get it, because it smells like fish…