yes this is doing your skin alot of harm, there are actually tests you can have to see how sunbeds/sun has aged and affected your skin, you would be shocked and horrified at the results,
im sure not everybody who goes on a sunbed will get skin cancer, but the ones that do are definatly increasing their changes of getting cancer by ALOT, if you got skin cancer and were told there is nothing they could do for you, would u think 6 minutes was worth it?? seriously get a spray tan, much safer xx