thrust distance per coitus session: 13 cm x 300 thrusts x 2 (accounting for insertion & removal) = 78 m
coitus sessions to accumulate 5 km of thrusts: 5 km / 78 m = 64.1 -> 64 sessions of coitus
So OP’s wife would have to fuck 64 times to accumulate 5 km of cock. Even with amazing refractory periods, that’s still a minimum of 32 guys running a train on her.
Edit: working through this reminded me of that episode of HBO’s Silicon Valley where they started talking about handjobs and hotswapping dicks and hit on middle out compression.
She was planning on having 5 km of cock run on her, now her plans are ruined.
Because I’m procrastinating at work:
How many sessions of coitus might it take to accumulate 5 km of cock thrusts?
Estimates:
Calculations
So OP’s wife would have to fuck 64 times to accumulate 5 km of cock. Even with amazing refractory periods, that’s still a minimum of 32 guys running a train on her.
Edit: working through this reminded me of that episode of HBO’s Silicon Valley where they started talking about handjobs and hotswapping dicks and hit on middle out compression.
My favorite part of sex is taking my average sized penis all the way out and putting it back in approximately 300 times