The problem was that there was just one set of underwear 
Ahhhh, missed that, now the whole thing makes sense.
But I'm sitting in an Airport Lounge after a 11 Hour flight with another 13 Hours to go, just about anything makes sense.
If there was only one set of underwear ?? what was the other Lassie wearing while the other lassie was wearing the underwear ??
Starting to see why Bornshooters Body was damaged