Explanation #1 (Rashi): [What is the proper amount] so he will not bear sin, even if he can entice her.

Question: How was R. Akiva able to go [to learn for so many years], and also all those [brought] below?

Answer: There, without enticement they were happy that their husbands go to learn Torah and be Talmidei Chachamim. In fact, they married with this intent, that they go to learn Torah!

Explanation #2 (Ri): We discuss workers, and not Talmidim, for even without permission, [a Talmid] may always go for 30 days and return to his house for one day;

Here, the verse says that [after a month away] he must be a month in his house, or two months according to [the latter] opinion, even though he has permission! Rather, it refers to workers.

Support: Also the verse that we bring discusses workers.

Question: Why does it say below "there is different, for there is extra money"? Also workers in our Mishnah have extra money [when they go away to work]!

Answer: The extra money there, for one who works for the king, is greater.

Question: This verse "v'Atah Ben Adam He'anach b'Shivron Masnayim" is written regarding the Beis ha'Mikdash!

Proof: It says after it "v'Hayah Ki Yomru Elecha Al Mah Atah Ne'anach v'Amarta El Shemu'ah Ki Va'ah v'Namas Kol Lev"!

Answer: That verse was before the Churban;

The Navi told Yisrael that he was sighing on hearing about the future Churban of the Beis ha'Mikdash, and then every heart will melt amidst the sighing there will be after the Churban due to hearing about [Churban] Beis ha'Mikdash.

Explanation: They are called so because they are regularly in the shade of their houses.

Explanation: We discuss Talmidim who learn in their city. If they learn in another city, why do [their wives] lose sleep? It is not normal to enter the city at night!

Implied question: Why don't we ask from the Reisha, which says that workers [may go out for] one week?

Answer: The Reisha does not discuss Onah. Just the contrary, it teaches that one may change and be Mevatel the Onah from their initial custom;

However, it is a proper question from the Beraisa. It discusses the Torah law of Onah, and not leaving without permission.

Proof: The Beraisa says "once a week." It does not say "one week", like [the Reisha of] our Mishnah.

Answer (cont.): The Gemara answers that the Beraisa discusses one who works in another city. This was their custom.

Question: Why does it discuss when this was their custom? Even to change, a worker may [leave for] a week, like I explained on the Mishnah!

Answer: The Beraisa teaches that even if their custom is to work in another city, if they want to change and delay longer, they may not.

Explanation #1 (Ri b'Ribi Baruch): There are three laws of workers. Those who work in their city, their Onah is twice a week, like our Mishnah teaches;

The Beraisa discusses those who work in another city and return to their houses every day. Their Onah is once a week, because they have toil of traveling;

Those who do not return to their houses, whether or not this was their custom, the Reisha of our Mishnah teaches that they may go out for one week;

Inference: They are away all seven days, and return every eighth day.

Explanation #2: The Ri explained that there are only two laws of workers. [For some,] the Onah is twice a week, and [for some it is] once a week, like I explained.

Question: We said above that there is different (one may go to work for the king every other month), because there is extra money!

Answer: Perhaps working for the king brings more extra money [than the difference between a donkey-driver and a camel-driver].

Explanation: Regarding one who feeds his wife through a third party, the Mishnah (64b) says that he gives to her two Kavim (of wheat) and does not refrain from relations;

One who rebels against his wife regarding [refraining from] relations, we increase her Kesuvah three Dinarim [per week - 63a]. According to the calculation that four Sa'im [24 Kabim] sell for a Sela (four Dinarim), three Dinarim [buy] 18 Kabim. The Aruch explained like this.

Explanation: This is because the three of them saw each other, like we say elsewhere (Bava Basra 59a) that R. Oshaya said something, and they asked R. Bisa about it;

Therefore, he applied to them "ha'Chut ha'Meshulash Lo vi'Meherah Yinasek", i.e. it will never be uprooted from his seed;

This is like we say elsewhere (Bava Basra 85a) once a man learns, and his son and his son's son, from now and onwards Torah returns to its host. We expound from "va'Ani Zos Brisi [...u'Devarai... Lo Yamushu mi'Picha umi'Pi Zar'acha umi'Pi Zera Zar'acha... Ad Olam]." (See also Tosfos Bava Basra 59a.)

Implied question: It says in Pesachim (49b) that R. Akiva said that when he was an Am ha'Aretz, he used to say "who will give to me a Talmid Chacham, and I will bite him like a donkey!"

Inference: He was not virtuous!

Answer: He did not say so because he hated Talmidei Chachamim, rather, because he thought that they are haughty over Amei ha'Aretz due to their Torah, and they hated Amei ha'Aretz;

Also, [he said so] because [Chachamim] did not let [Amei ha'Aretz] touch them, like we say (Chagigah 18b) "garments of Amei ha'Aretz are Medras (Tamei) to Perushim";

However, in any case he guarded the Mitzvos (R. Tam).