How on earth do I go about including an expression of wish in our invites without offending everyone? 
Basically we have been living together for 9 years so we don't want or need toasters, plates, ornaments or towels. We do desperately want a cracking honeymoon as we haven't had a holiday in six years. However I know that, according to Mumsnet, asking for a honeymoon contribution is considered very bad form. So, please tell me how to acceptably word the following:
"We really don't need anything, or expect anything, however, if you really want to buy something - please contribute towards our honeymoon."
PS - we are talking a long weekend in Europe, not a month in the Maldives.