Kutcher, who reportedly had brief fling with Lohan in the past, feels obligated to let Lohan treat him like her own personal cash machine.
"Ashton has always had a soft spot in his heart for her, and Lindsay totally exploits it," showbizspy.com quoted a source as saying.
"She has been asking to borrow hundreds of dollars at a time with the promise to pay him back 'in a couple of weeks.' Ashton knows he's never going to see the money again, but he's very loyal," the source added.
20 Oscar facts: Interesting trivia about the Academy Awards
Photos: Alia Bhatt, Sunny Deol at an event in Mumbai
Photos: Akshay Kumar, Taapsee Pannu promote 'Naam Shabana'
Flashback: When sexy models sizzled in bikinis at Tokyo fashion show
Photos: These Indian cities top the list in online purchase of sex products