The "get a beer with" thing is about trust and being comfortable. Sounds like, "handing him a piglet" is your version of this. His reaction makes you trust and be comfortable with him as a decent human.
I vote, you now use the phrase, "I'd hand that guy a piglet." And make it your own.
Venmo usually, but many banks have built in cash payment apps too.
I'm 35 and never had a PayPal account and have never felt the need for one