Yes, if both are willing.
no reason not to.
If you like him -NO. If you are not too sure if you like him- if ya wanna, then do it. If you dont feel right- no way!
It depends on whether you felt a connection for that person. If you do it out of obligation, then no.
If she's cute... YES!!!
I agree with what my math teacher used say, you should always wait until the third date.