Women will just paint their already long and sharp nails and laugh amongst themselves about how guys just don't get it, that if all they needed was a long talon, they'd do it themselves, with thier nails.
first, no woman who prides herself of her long nails enough to paint them gloriously red is likely to start ripping open sealed disks with said nails. ruining both her nails and the gloriously red polish.
second, women who want long nails to paint them gloriously red would chose to mate with guys with big talons for ripping stuff open for two reasons. She wouldn't have to rip anything open herself, plus her daughters are likely to have sturdier and longer nails to paint gloriously red. Also because their dads would be ripping open all the stuff for them all the time.
In the end, it all hinges on the value of long gloriously red fingernails in the struggle for life and reproduction. A trait in women, mind you. It may well be that the evolution of trait of the talon with men depends on the reproductive success of women with long and gloriously red nails.
Amazing, isn't it?