[TorryJens]

"Culture has an impact on genes over a length of time. This is not a baseless statement. This has been proved scientifically by anthropologists beyond doubt. If your ancestors had chosen deliberately to follow a certain cultural practice(culture includes specific food habits too) and had followed it for a long time it would mean your genes have been influenced sufficiently by these practices."

as beautifully said by Shri Suraju sir, our mind gets attuned to these cultual practices that certain things become taboo or we do not venture into that. This has been my experience. at times, i used to wonder why certain things which are crazily sought after by some people, never used to interest me. The above inverted quotes explains that.