You have put out a lot of different topics here:
- prostitution should be allowed, in the end of the day no harm is done and it's done illegally anyways
- drug, some heavy drugs like heroine and chemical ones, I don't think should be allowed, if you drive under drug and kill someone, if you need money and start rob or kill for money, then you harm others, and heavy drugs are very dangerous, it's not cannabis
- euthanasia, I think one should be free to do what he wants with his life, you want are tired to live? OK end it legally under state check
- abortion, should be allowed always in first months , but people know how kids are made, if it's a 'mistake' pay a fee and use damn protections next time