How does sex even work

Okay so I’m sorry I just honestly don’t understand. Like I get the biology, but I don’t get how it actually works. I’m young and not planning on having sex any time soon I’m just really curious. lol thanks to anyone who can explain it

EDIT:

Okay so people seem confused as to what I’m asking ahah. Sorry. I just want to know like how it works. Like I know you don’t just walk up to someone and then poof their dick is in you like how do you get to that point. Because I always as a smaller kid thought it just happened and Yh but then I now realize people talk before like then he gets a condom on and you just like hug him or what hahaha. Or like how do you get to the actual sex part if that makes sense

EDIT:

Wanna keep this anonymous but thanks guys hahaha I think o get it now some of you answered my questions like about the lead up I guess. Anyways, thanks, byee