Scratchy assembles a small stall outside on the streets - as the market calls for people to consume their vegetables and fruits, or deli meats, Scratchy calls to the overarking people, "Mustard or Mayo!" In a pale faint voice.

Taking out small metal cups, filling them with a selection of mayonniase's and mustards - various kinds appear, from Garlic infused mayonnaise, to a mix of Tomato ketchup and Mayonnaise, making a orange swirl and on the other side variety of mustards with strong ashy odors. Next to the samples that are presented on the stall is some cooked meats, steaming inside of a fish cloth with elongated tooth picks for people to dip into.
 

"Free samples, tell me what you'd prefer, the vile yellow, monstrosity that evaporates all taste of food with a chemical-like taste, straight from the bowels of the 9 circles of hell, Mustard," Turning with a vile frown, to a delightful grin as he wavers his hand towards the section with mayonnaise, "-or the fluffy and faithful - creamy and flexiable, protien and fat filled mayonnaise that works with anything, even a hotdog or pizza!"

Mayo is the best on anything, i squirt that on anything  yummo

Mayo on some tuna fish... mmm, yeah, that's delicious

Don't forget the Ritz crackers, gotta dip em into the tunafish mixed mayo. 

Mayo on a hotdog? You've done lost your mind.

Why not both?  Who doesn't love a huge pizza smothered in mayonnaise and mustard? A creamy yellow conglomeration of fat and starch.  

Mayo or Mustard?

I guess that depends on what I am making or eating at the present time.

Take Deviled Eggs, for instance.  It definitely requires mustard, but I do not like to use Mayo, I  prefer Miracle Whip for these.

Take a Hot Dog. NEVER does mayo belong on this.

A chicken sandwich requires the real thing - Mayo.

I could go on and on but will stop. :D

~Kitt~

Both condiments have their place. 

coating chicken in mayo or mustard prior to cooking both lend for tenderness and flavor. 

Potato salad needs both, but I actually prefer mustard seed but will use a tablespoon of spicy mustard if needed.

Neither belong on pizza!

Mayo over pretty much everything mustard can go on. But, mayo + mustard mixture is godly.

Feel bad here as I am not a fan on either.

I can deal with small quantities of mayo but would need to be mixed with something else with a stronger taste.

I like both.

Greek gyros with potatoes and mustard is one of my favourite.

Kraft mayonnaise with tuna is another weakness.

Unhealthy, however, too delicious.

Definitely mayonnaise, esp homemade! I'd need to mix mustard with mayo to eat it too lol

Mustard all the way for me. Fun fact, mustard doesn't only taste good but also contains antioxidants, thus can protect your body against various diseases. Ancient Greeks used mustard both as a medicine and a spice. The Romans did the same, ascribing it as a cure for anything from hysteria to snakebite to bubonic plague.

Mustard on my hotdogs, Mayo on my BLT's, tuna, and on all ham sandwiches.  

mustard is goated and undisputed winner here. mustard can go on everything and taste better