Chill people. A little bit of hanky panky is OK. gets the guy motivated to propose faster and get married. It's all part of the natural progression. Don't fight nature.
Disclaimer: I do not intend on laying next to you in your grave.
OR he could turn around and say, I don't feel enough chemistry with you so I don't think this is gonna work out
Either way its a risk, don't do it
And I just realized that ^ could be argued but whatever, tell him to put a ring on it IF YOU LIKE IT THEN YOU BETTER PUT A RING ON IT
Wait. I meant...just dont do it okay?