I love the idea but unfortunately if I try and fantasise about things like this I get too caught up in the details.
“It would be freezing cold for me as well. I’m definitely going to slip in all that mud. I’m definitely going to have rocks stabbing into my hands and knees while I penetrate her”
Now a girl walking down a street in a big rainstorm, letting her guard down and deciding to accept a ride from the nice guy in the van who was just passing by, that is a fantasy I can work with.