(I'm a woman) Bras are usually worn multiple times before washing. Good ones are expensive ($60-100 a pop), and the less wear and tear on them the longer they last, and the longer the fit that you bought them for is preserved.
Panties are changed every day, and are cheap in comparison to bras. You can get a 6-pack of cotton Hanes at Walmart for less than $10. Individual panties from a department store might cost $5-15 a pair. You can compromise on panty quality in a way you can't with bras. Cheap panties just fall apart a little faster. Cheap bras are daily torture.
I'd wager the average women most definitely owns 5 if not more pairs of panties for every bra she owns.
Edit to add: I would say the issue (with not seeing panties advertised as heavily on shopping networks) is more that panty quality is not so much of an issue. That 6-pack of Hanes will do you just fine and there's no constant need to find a better panty like there is to find a better bra. Bras suck, unless you've got small boobs. The balance of comfort, fit, and support is delicate. It's easy to try to market the New! Improved! bra. There's not really anything to improve about the panty.
Panties are changed every day, and are cheap in comparison to bras. You can get a 6-pack of cotton Hanes at Walmart for less than $10. Individual panties from a department store might cost $5-15 a pair. You can compromise on panty quality in a way you can't with bras. Cheap panties just fall apart a little faster. Cheap bras are daily torture.
I'd wager the average women most definitely owns 5 if not more pairs of panties for every bra she owns.
Edit to add: I would say the issue (with not seeing panties advertised as heavily on shopping networks) is more that panty quality is not so much of an issue. That 6-pack of Hanes will do you just fine and there's no constant need to find a better panty like there is to find a better bra. Bras suck, unless you've got small boobs. The balance of comfort, fit, and support is delicate. It's easy to try to market the New! Improved! bra. There's not really anything to improve about the panty.