He's one of the world's leading arms dealers in the movie. It would be like if the Lockheed Martin facility got shot up by one of its own jets and then went "OH MAN THIS IS SO IRONIC." The rest of the world would just say "Well, you do produce thousands of jets a year and send them all across the world to different clients, which not only makes you a prime target to be shot up, but also makes it more likely for enemies to have said jets, because if nobody were producing them then nobody would have them."

But the people below me are right. Enjoy the joke for what it's worth; it was a funny pun. It just wasn't actual irony.

but Y would he sell missiles to his enemy, and you can say " for money" but stark sold to the US military

Too lazy to look for appropriate photo to respond with but...
Nigga, that shit is redundant!
She hasn't cheated per definition. But I think it's safe to say that it does not show high morale if she/he knew the other person was in a monogamous relationship.
However the majority of the blame would of course fall upon the person in a relationship.

At least thats my opinion on the subject.

it wasn't me.

So said shaggy but that motherfucker got caught red-handed!

I only made it to Mothra...

With different lyrics my friend.