Are girls supposed to shave down there before having sex?!

Some guys like it, others prefer natural, and still others prefer trimmed (hair present, but not fully natural).

No
It depends on u and ur partner
Some girls shave bcos they and their partner like it and they say it's more sensitive down there and it feels good
Others like hairy,it has its own sexual attraction
For me personally either shaved or hairy(even it's very thick) I like it
Both feels good when I lick them:)

There is no rule. Most of us (guys) like the area to be shaved but there are also guys who like the hairy.

Also, you can make styles down there

You can shave your legs anytime, in fact I think most guys would want your legs shaved before having sex.

yea i do some men like it better its just cleaner but u dnt have to just keep it trimmed