Hahaha, I had a friend around college time where we had the exact same dialogue every time:

• Hey, wanna go watch a movie?
• I can’t, I don’t have any money
• How many times have I told you, I’m asking you if you want to, not if you can, I’ll pay for you

I wasn’t rich or anything, but paying for that extra ticket or meal wouldn’t break my bank and he was my friend, I enjoyed hanging out with, so I would gladly spend that money to hang out with him.