jazaks for ur question. it comes up a lot! i think a girl even attacked me at a sisters party once about it and i was like
i thought we were going to have cake now?? lol
the thing to understand here is that there are a lot of hadith and quranic verses about the beauties and reward of paradise. but yet we know Jannah is a whole different world/realm/dimension and that we will have what "no eye has seen, no ear has heard, no heart has perceived.....
Abu Huraira reported Allah's Apostle (may peace be upon him) as saying that: Allah the Exalted and Glorious, said: I have prepared for My pious servants which no eye has ever seen, and no ear has ever heard, and no human heart has ever perceived but it is testified by the Book of Allah. He then recited:" No soul knows what comfort has been concealed from them, as a reward for what they did". (xxxii. 17) [Sahih Muslim]
meaning it's not going to be anything like what we think or anything related to human earthly existence. but yet each person - man and woman will get their reward and be extremely satisfied and pleased.
For Muslim men and women, for believing men and women, for devout men and women, for true men and women, for men and women who are patient and constant, for men and women who humble themselves, for men and women who give in charity, for men and women who fast, for men and women who guard their chastity, and for men and women who engage much in Allah’s praise, for them has Allah prepared forgiveness and great reward. (Quran 33:35)
so why do we look at "hoors" or whatever anyone gets in Paradise and use our earthly sensibilities things like marriage/jealousies etc to try to evaluate it.
everyone will be happy and fine and will get what they want inshaAllah. these verses are meant to motivate us. i'm sure gardens and springs and fruit and women were all extremely beautiful things when the Quran was revealed as they are today.
let's as the sister said work towards getting there first too!!
also related to your query hoor al ayn are separate creatures in paradise, mostly interpreted as beautiful women but i did read somewhere once that said it could be men as well? and that 'can't be seen by the others' i think is meant to illustrate how big, spread out and interesting it will be not about "ppl not knowing".
and Allah knows best.