Your toenails don't have to be very long to cut holes through your socks, especially after extended wear. I've got lots of socks, but most of them got holes. When go people's house for shoot, most of the time must take off shoes, so can be quite malu if your socks look very "well-ventilated", lah (for me anyway). I was thinking maybe the couple will see me very poor thing and give me fatter ang-pow, but I think not lah.
So I say, make it a habit to trim your toenails often. Or at least, get a pair of standby socks, just in case you mis-time your laundry schedule and all your good socks are not available.