My short answer is: The word "Stethos" which is translated breast: [Luke 18:13][Luke 23:48][John 13:25][John 21:20] and in [Revelation 15:6] all indicate the scriptures are speaking of the entire upper torso more than the frontal region. On the other hand "Mastos" in [Luke 11:27][Luke 23:29] and [Revelation 1:13] are more indicative of the mammary gland area. I'm not sure that this is a male/female thing and indeed the definition does not indicate that either: 3149. mastos (mas-tos')a (properly, female) breast (as if kneaded up) The word "female" is bracketed (.....), so it is not exclusive. Also.....[Luke 23:48] would indicate that "Stethos" could be used to describe both sexes as well.
My long answer is: To me.....the word "Stethos", from which stethoscope comes, has an internal meaning also.... whereas "Mastos" speaks of only the outer surface area of the mammary. In our scripture [Revelation 1:13] Our Lord is wearing a holy garment indicating an office of priesthood as explained in [Exodus 28:4] and it went around the breast but was girted around the loins. And these are the garments which they shall make; a breastplate, and an ephod, and a robe, and a broidered coat, a mitre, and a girdle: and they shall make holy garments for Aaron thy brother, and his sons, that he may minister unto me in the priest's office. Our Lord is in the midst of seven candlesticks (the seven churches)(verse 4) and instead of being a priest....He is now the judge [John 5:22] and the golden girdle is no longer about the waist....but is now around His shoulders and His paps signifying His new office. The priesthood is over.
I believe your scriptures indicating no genders in eternity are something we all need to wonder about a bit longer. Whatever The Lord has in store for us I'm positive it will be an improvement. I don't think this scripture [Revelation 1:13] is indicative of anything about that or male/female in general. I think John just wrote that verse inspired by the Holy Spirit indicating the garment would be worn differently than that of the Levitical Priesthood. Remember, The Lord's Day, written of by John in verse 10, is not some sleepy Sunday morning on the island of Patmos. It is "The day of The Lord" spoken of in many prophecies [Joel 2:31][Joel 3:14-15][Zechariah 14:4][Isaiah 14:10][Matthew 24][Revelation 6:12-13].....the beginning of the Millennium and Our Lord's 1000 year reign on this Earth before ushering in Eternity!
I'm sorry it took so long to respond. I have had a very busy week....capped off by grandchildrenitis this weekend! I know.....you've been there....done that!
Grandchildrenitis - You have coined a new word and I'll bet all grandparents know just what you mean. My Mom (86) had one of her great grandchildren spend the night with her last week. The first hour was wonderful as the four year old talked about many things but then she tossed all night and Mom finally gave up and went to sleep on the sofa. Before long, she felt a tapping on her shoulder and heard, "Gigi, you need to come to bed". No rest for the weary....
Thank you for your answer about Rev.1:13. Even with the explanations you've given it just seems to be a very strange wording. Who knows? I think you're right in that "we all need to wonder about it a bit longer" and that whatever it is, "it will be an improvement".
Have a terrific labor day and thank you again......Ping