One of the reviewers said it perfectly, "Make your partner's body your canvas or use this as an oral sex aide" (Source).

You could use it in foreplay and drizzle it all over each other's bodies. Paint, write stuff, or just make a big goopy mess. You can also slather it on for oral sex, either guy or girl. I can't tell for sure if it's for external use only (meaning don't put it inside of your vagina!), but if you can use it for oral, I would imagine that it's okay if some gets in there. Might want to check the reviews or packaging info on that one!

Hope that answered your question less