Does he know what he’s talking about?

Hi, I have a question. So I’ve been hooking up with this guy for 3 weeks now, he’s great and really attractive 😍😍. The first night we had sex (like day 4? of knowing eachother) it was amazing but at the end he took off the condom and came in me!! So I asked him and he said that because he had the condom on and there’s spermicide in condoms that it was fine (I looked it up and it’s true) and that the sperm would all be dead by the time it passes through the spermicide. I said that makes a lot of sense so I wasn’t mad and also he told me spit kills sperm (we did oral on eachother) so we are both fine with him using the condom until the end and we continued to have sex throughout the last few weeks.

I am new to the app and just input my cycle information and turns out I was in my fertile week the first week we had sex. I told him that and he said you can only get pregnant that one day and not during the fertile week, which again makes sense, since that is the one day you actually ovulate you know? Anyway, my period is due today and usually I start overnight but nothing yet. He says i probably haven’t started because all the sex and sperm inside backing everything up? He has 4 sisters and was raised by a single mom so I know he knows what he’s talking about.

-is any of this information wrong? I don’t think it is but then again I’ve never heard any of this before.

-staying anonymous because my cousin told me to download this app and her and my aunts use it so I don’t want them to know it’s me.

-thanks in advance.