SQL & PL/SQL

hai friends,

i have a simple problem .. i need to insert :&nbsp this string into the table ...but it is a bind variable ..hence it is pop up for the input values...but i need to insert the string itself...how can i sove this problem...

for escaping & i used the *\* but i can't trap
like,

 SQL> insert into tst_tab values(':&nbsp');
 Enter value for nbsp: john
 old   1: insert into tst_tab values(':&nbsp')
 new   1: insert into tst_tab values(':john')
 
 1 row created.
                         actually i need to insert ":&nbsp" as a strings but i  cant... 
                         note : *:* and  *&*


 

so please help me to solve this problem...

regards,
john