I just told my husband that I was reading online about how a woman wanted tuna but her husband wouldn't let her have any. He said, "Good for him, being a man, wearing the pants." Then he cracked up and told me not to hit him as he ducked. We've been together since the 90s, and I don't think he's ever told me I must or must not do something. Yikes. I can't even imagine living like that.
To the OP: limit your intake, or find a brand that is low mercury. If you're craving tuna salad, find another flaky fish that is lower in mercury and make a mock tuna salad with it.