Bash-sex (source extra) is a trivial plugin system for your bash shell. Use responsibly.
Firstly, clone the repo into your ~/.config/ directory.
Then add the following to your .bashrc:
. ~/.config/bash-sex/foreplay
Then use either
sex --ask-once # propose it first
or, if you really want this...
sex --yes
Those can be placed in your .bashrc as well, if you feel addicted to bash-sex (no support group yet, sorry!)