"i am not at all physically attracted to you"
is an absolutely valid reason to not want to date someone.
People had the nerve to call me shallow for this.
By the way, it’s also totally cool to turn someone down without explaining your reasons. You are not interested, no will suffice. Do not feel pressured to explain your decisions to someone else.
once upon a time, i was in an honors english class as a sophomore in high school, and we covered the great gatsby
and once a day, every day, one young man would say, in the exact same inquisitive tone of wonder,
"wait a minute! is nick gay for gatsby?"
until finally, one day, our teacher shouted, “YES NICK IS GAY FOR GATSBY BUT I CAN’T TEACH YOU THAT BECAUSE THIS IS A CATHOLIC SCHOOL.”