I feel very unconfortable when people bring up their sex life

I think it mostly comes from my two ex close friends rubbing their sexuality in my face weither I wanted it or not. They litteraly made everything about sexuallity in their relationship, when we were seeing friends they were leaving in the middle of the evening to go fuck and stuff. They even had sex like 2 meters away from me (same room) even tho I had asked previously in the night to talk with one of them about my groomer because I hadent been feeling well at all.
I have no issues with people having a sex life I dont come from a conservative stay pure place but I do think there is boundaries to respect especially when non consenting people are involved.
And now two of my close friends from my friend group are dating and they have a sex life (which im not having to see thankfully) but whenever they make a joke or something like that I get so unconfortable and I almost think theyre disgusting for it even tho I know they are not.
I dont know how to navigate this I felt this in the past but a very long time ago and I wasnt as close with people.
I believe in people do what they want weither its having a lot of sex or not at all its not my place to care. So I dont know why I feel that way and I dont know how to navigate this with them or with myself at all.

https://redd.it/1x7vtvu
@asexualityonreddit