The rules are simple:
If you want to date the person who posts this and go beyond being friends reply saying "I want to date you"
If you want to play with the person who posts this reply saying "I want to play with you" and what activities you want to do, top or bottom, etc. (MZ: I'm not into much in the way of kink however...)
If you just want to have sexual relations with the person and stay friends, reply saying "I want to add benefits to our friendship."
If you want to see the person who posted this more often IRL, reply saying "I want to see you more often."
If you just want to get to know the person who posted this better, reply saying "I'd like to get to know you."
Nervous? Don't be. Everyone's doing it. (MZ: Where 'everyone' means a handful of people...)
The fun comes when you repost this and see who replies.
All replies are screened and will remain screened unless you say it is OK to unscreen. Heck, reply anonymously and tease me if you want. I even turned off IP logging for now. Obviously if you post anonymously I can't reply to you unless I unscreen the comment and make a public reply. Keep that in mind - either provide a way to contact you or say I can unscreen or I won't reply to anons.
EDIT: I editted to add some ideas from lizzielizzie