This is discussed in the end of Nedarim: a guy makes a neder not to get benefit from anyone in the world if he were to marry until he finishes learning the whole mishna. Apparently, marriage in those times required people to work, so he wanted to learn first full time and used neder to strengthen himself. Apparently, he needed chizuk as it was not “a thing”…
Then, turns out, he is not that capable, so he was not able to finish Mishna so far. Apparently, there was no social promotion at the time.
So, now he is sitting and “learning” and not able to get married. Apparently, learning to avoid social obligations was frown upon at the time, so all amoraim rush to trick the guy into marrying and then throw dirt on him, so he now needs a cleaner (apparently, he did not learn cleaning skills also), so he goes to do hatarat nedarim.