Using Magazines in a Different Way

One of my favorite sex acts is coming on a womans face. My girlfriend isn't fond of this though, so I've improvised and came up with this: I go thru her old Cosmo mags, and find pages with full face pictures. I then put a bit of lotion on the page and 'fuck' the pic til I spray my cum all over it. I then throw the magazine out. While she knows I masturbate (and approves of it), I don't think she'd be all that happy with this technique.