is it weird that my dad asked me for help to remove his shirt

im 17 and ever since my parents got divorced i’ve been living with my dad

i had my friend over and we were in my room. my dad called me from his room so i went. bascially he hurt his shoulder a couple weeks ago and he finally saw a docotor. he got some ointment and like this cooling patch. he asked me to help him remove his shirt because he can’t really reach all the way back with his arm. then he told me to apply the ointment and the cooling patch on his shoulder. i did and then when i finished i went back to my room.

my friend asked what took me so long and i told her, and she said that that’s kinda weird and how she’s never even seen her dad shirtless before. is it a weird thing to do??