how many hearts have you broken?

On a quick stop at the gas station, I ran into pre-pay with my cash, two men were working behind the counter, like cute grandpa age older Italian men....

"$10 on #4 please"
"ok ok but hold on, we have a bet going on that we need you to settle...."
"alright, whats the bet?"
"Ok, I say 10, and (pointing to the other older gentleman) he says 8...so answer"
"what...?"
" So tell us! .....How many hearts have you broken?!?"

hahah I just laughed, and tried to explain to them I have never broken a heart they proceeded to tell me that is not possible and I must have broken at least ten! haha

Thanks gentlemen you sure flattered this girl today!