It's
not wrong, but it has a danger to it.
Fornication
is clearly wrong, and the Biblical advice is...
“Flee
fornication...” 1 Corinthians 6:18
Here
are two quotes I've heard that I think are good advice.
He
who keeps off the ice will not slip.
He
who wants to keep from harm must keep out of harm's way.
That's
the safest way.
If
all couples didn't touch till after marriage, there would be a lot
less problems! Touching before marriage can make the temptation
stronger. Also, until you're married there's always a possibility
that something will happen to break the relationship.