i want to cum inside a girl.
how do?
Spot a pretty girl down the street.
Chloroform her when she's not looking; DO NOT RAPE HER
Make your basement really stuffty and look like it hasn't been used in years, and make sure that chloroform is was strong.
After your girl wakes up, confused, tell her that the apocalypse is happening and hell is breaking loose, luckily you saved her last minute. Talk to her, feed her some crap food until she's half-delusional. Tell her we have to continue the human race.
Mission Accomplished.