Question of the Day.....Monday

Why do women who are over 70 (at least) find it appropriate to just wear a jog bra to the gym and no t-shirt over their stomach? I find this odd that a grandmother is fine with showing her stomach (yuck old skin) and the rest of us are working our behinds off just to look good in clothes. Good for them for working out but I don't want to see anyone's stomach over the age of 60. Ageism I know but there has to be a limit.