With blender, combine the egg, vinegar, salt and sugar
Add 1 tablespoon of oil and beat it in very thoroughly
Once the first tablespoon is completely blended, add 2 more tablespoons and blend thoroughly
Add 3 more tablespoons and blend thoroughly
Once it is blended thoroughly, you can begin pouring in the oil at 1/4 cup then blend
Use enough oil until the mayonnaise reaches the desired thickness
If it becomes too thick, add vinegar or lemon juice a teaspoonful at a time