| Value | Category | 
                                    
                    
                        | 1 | 1. Every time I have sex | 
                                    
                    
                        | 2 | 2. Often | 
                                    
                    
                        | 3 | 3. Sometimes | 
                                    
                    
                        | 4 | 4. I have only tried dry sex once or twice | 
                                    
                    
                        | 5 | 5. Never | 
                                    
                    
                        | 8 | 8. Refuse to answer | 
                            
            Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.