None of the answers are correct here because they IGNORE VERY SIMPLE FACT! Fact that is, where this verse comes from?
You can not correctly judge the subject matter of "Once upon a time and a very good time it was there was a moocow" unless you know that this line is opening line of Portrait of an Artist as a Young Man by James Joyce!
So, one must understand what 4.34.2 is. It means 4th Kand (book), 34th chapter and second verse.
So its a verse in 34th chapter of 4th book of Atharvaveda.
What does it say? We will come to a bit later but literally it says this
अनस्थाः पूताः पवनेन शुद्धाः शुचयः शुचिमपि यन्ति लोकम् |
नैषां शिश्र्नं प्र दहति जातवेदाः स्वर्गे लोके बहु स्त्रैणमेषाम् ||
Its English translation, thanks to Whitney is something like
“Boneless, purified, cleansed with the purifier, bright (fttci), they go to a bright world; Jatavedas burns not away their virile member; in the heavenly (svargd) world much women-folk is theirs.”
Sounds kinky, right? Dicks… women and what not? Let wait a sec. First Lets check where this shloka is:
34 chapter of 4th book. Title of the chapter : ब्रह्मौदन सूक्त
सूक्त mean praise of, Extolling as in prayers extolling heavens.
What is ब्रह्मौदन?
ब्रह्मौदन = ब्रह्म + ओदन … WTF is ओदन? Its the sanskrit word for … wait for it…. COOKED RICE!
So ब्रह्मौदन is the food/cooked rice you offer to fire during a Yagna.
How do you feel about “dick” and “women” of …. RICE??? What? Why so absurd!!!
So whats with dick and burning and all?
Dick or शिश्न is not just a naughty part but also the male reproductive organ. Or organ capable of CREATING LIFE! You see ancients knew how babies are made. Even now a person whose "male anatomy" stop working is called "impotent" ... Impotent with respect to women. So ... Fire does not burns "Rice's or Food's dick" meaning Fire does not renders this offering impotent.
And woman is not just a female human but it is also the fertile sex in humanity. The sex capable of bearing child! A sex capable of begeting something.
Do you see where this is going? Second part of verse is :
Purifying fire does not burn its dick or in other words, fire does not make your offering impotent. In heaven such offering of food to Yagna fire has many women or many fertile enities capable of begetting "Something".
This chapter’s second verse qualifies the ब्रह्मौदन ie offering of food to Yagna fire that
This (food/rice) is formless or it is means capable of taking any form, its cleansed with fire and air. It goes to a bright world. Purifying fire does not burn its dick ie does not render it impotent. In heaven such offering of food to Yagna fire has many women (or fertile entities) to act upon or it begets many fruits in heaven.
Its a rather “sex-positive” way of describing qualities of food offering given in fire. And certainly not that in heaven “certain kind” of people get many virgins.