Why would he want an audiophile son in law? She would be lied to all the time about how much things cost. Spend most of her nights alone on the couch while he takes apart headphones and puts them back together.
Yeah, why would I? Actually, the last guy she was dating, I was about ready to give a nice 10" subwoofer in a cabinet with a plate amp to him. My wife told me to hold off for a bit longer. As it turned out, a few weeks later, he started acting a bit weird and not hanging around as much (he has ADHD issues). Fortunately, I didn't give him the lil' beast. Instead, I was able to sell it on Craigslist for about $60. Put a little more cash in my pocket for my own headphone upgrades.
Now, if she's serious down the road about some guy and he comes over to meet us and starts talking about Bose, I'll probably have to ask him to leave the house.