"Can you dig a grave with a spork?" Thgeoretically, yes; as in:

One evening when Ole and Lena were courting, they sat down on the couch. Both being rather timid, they initially sat as far apart as possible. After awhile, though, Lena moved halfway over toward Ole.
Encouraged, Ole moved halfway over toward Lena. They continued in this manner. Theoretically, they never came in contact...