Would this still be illegal if ALL money raised went to CHARITY ?

Where would one stand legally, if one were to work as a Prostitute for the Sole Purpose of raising Money For Charity? Where I live,prostitution is illegal except if one is registered & has an exemption/licence. In such an area,if ALL Money Raised were given to a Registered CHARITY,would this still be illegal prostitution or would it be viewed as a Novel Fund-Raising effort?(which is what it would be). I ask because the thought of doing this has amused me for some time. NB: I'm too old to try it even if I had a mind to do it.)