Is it possible that these were a joke gift? I had a similar experience with my mother-in-law a few years back (though mine involved Superman undies*), and she nearly died laughing watching my reaction as I opened them.
*She heard from my mother that I liked to dress as Superman as a very little kid. She thought that was adorable, as mothers tend to do.
Moms can be pretty oblivious about this stuff. When my mom went to NYC on a trip (I'm pretty sure I was also 18 or 19 at the time, so this was a while back) she bought me a Seinfeld T-shirt that said "Master of My Domain".
Um...I'm a straight dude dating a bi girl and I'd find it pretty creepy to get her pants off and see Disney characters on her skivvies. WTF Dan, which straight dude did you even ask?
*She heard from my mother that I liked to dress as Superman as a very little kid. She thought that was adorable, as mothers tend to do.
I'm pretty sure she had no idea what that meant.
you forgot to use "Cisgendered" in your response, Dan.