Is it normal i put ketchup on almost everything?

When I was little, I refused to eat anything but sugar so my mom had to trick me and put my meat and vegetables in pudding so I would eat it. After I caught on to that, she introduced ketchup and ever since then, I've put it on everything. Salad, meat, Mac&cheese, grilled cheese, broccoli... To me, its tasteless and flavorless without the ketchup. Recently, my mom has been pointing out that I need to give it up and my sister says I'm "too old for it." What does that even mean? Who's too old for ketchup? But I do get self conscious when I'm at someone's house and I have the urge to ketchup on my food and sometimes I don't even do it. People stare or get grossed out sometimes when I do it. Should I ignore everyone about it or give it up?