Guy question

Hi all, so quick question. Why is it that guys ask you on a date by saying "i forgot my lunch, maybe if you did too, we can eat together?" Honestly, it might makes some girls feel like crap that the only reason thay are being asked out is because the other person "forgot their lunch." Please guys, get some balls and just ask someone out without thinking they don't care about you because they might. I guess it's just a lack of self confidence. I'm sure that happens to me sometimes, but I never really remember it.