This will answer your questions
(Luke 20:27-40)
Matthew 22:23-33 That same day the Sadducees, who say there is no resurrection, came to him with a question. 24 “Teacher,” they said, “Moses told us that if a man dies without having children, his brother must marry the widow and have children for him. 25 Now there were seven brothers among us. The first one married and died, and since he had no children, he left his wife to his brother. 26 The same thing happened to the second and third brother, right on down to the seventh. 27 Finally, the woman died. 28 Now then, at the resurrection, whose wife will she be of the seven, since all of them were married to her?” 29 Jesus replied, “You are in error because you do not know the Scriptures or the power of God. 30 At the resurrection people will neither marry nor be given in marriage; they will be like the angels in heaven. 31 But about the resurrection of the dead—have you not read what God said to you, 32 ‘I am the God of Abraham, the God of Isaac, and the God of Jacob’? He is not the God of the dead but of the living.”
Well that's pretty solid, Marty. Not without questioning, but it is as solid an answer I've seen.
The verses you gave noted angels in heaven. What about the angels who and when they appeared on earth? I am not purposely trying to debate you on this, but rather putting forth questions to think about:
1. While Adam in his original creation was never called an angel, he did have such qualities. The Bible never said he has sex with Woman (Eve), but the results do suggest that more than they do suggest he ate an apple.
2. There is Genesis 6. Some suggest the Sons of God were angels, some say they weren't. Clearly, these sons of God lusted after the
daughters of men. The result was children of higher statute than mortal men. They were giants and men of renown.
3. Jacob wrestled with an angel. Or did he? Taking a close look at the text, Jacob's opponent is never called and angel (at least not in the Genesis account). He is identified as a man.
What has this to do with sex? Well, nothing. But knowing what the perception is of angels amongst the general public, how would Jacob (a mere mortal) stand up to an angel in a physical fight?
Angels are not human; I agree. But at times the can have human characteristics.
But that is assuming you believe he wrestled an angel and not a man, as the Bible identifies him. In any sense... several scriptures show that angels can appear to the eyes as mere men. They can eat, be famished, need rest, have a gender identity (which is always male). Why would they not have sexual organs in their human state?
4. Mary got pregnant. By whom? Was is the first person in the Godhead or the third? Was it the Father or the Holy Ghost? That's a good question for the Trinitarians here, but that is not our discussion. Matthew 1:18 says the Holy Ghost was the One who left Mary with Child.Now the Holy Ghost isn't an angel, nor does it say there was sexual penetration. But it does say that she was pregnant by the Holy Ghost.
Now then.. what is the reason for sex? It's to produce offspring. It feels great. That is the incentive program God gave us. But the primary reason is to produce offspring. So while I don't believe the HG penetrated Mary, a sexual act did happen. The Holy Ghost probably doesn't need an orgasm, isn't interested in one, and I don't believe anything "physical" happened. Mere spoken word power.
Those, again, are questions and points to consider. Personally, I believe they are capable of having sex. But aside from Adam (considering he may have had angel status) and what happened during Genesis 6 (again, if they were angels, and I believe they were),
I do not believe angels have sex. I cannot remember a single angel having a son or daughter aside from Genesis 6 if those sons of God were angels. And frankly, they were never God's angels. They were his Sons, but only because he created them.