Sam and Jack had plenty of angsty UST - to the point where it nearly got them killed in that episode with the brainwashing and Tok'Ra treaty - it's true. It was lots of fun, even if there were plenty of times I felt like smacking both of them over the head and telling them to get it on, already. After Jack left her immediate chain of command, I like to think they finally did.

why can't I punch stupid people through the internets?

Because if I don't get to, no one does. ;)