Operating costs averaged $22650 ($65/day) per inmate in fiscal year 2001 according to this report. It has much more info, tables by state and comparisons to amounts spent on health care, etc. Cost of incarcerating a US prisoner in secure custody in. 2003-4 was about $28 000 (Â£15 800).
Genital warts are small fleshy growths or bumps that can appear on the shaft, and sometimes head, of the penis or under the foreskin. They are caused by the human papilloma virus sexually transmitted infection (STI).
Masturbation is harmless, but if you do it a lot your genitals may feel sore. If men do it a lot in a short space of time, they can get a slightly alarming looking swelling of the penis, called oedema, caused by fluid in the tissues.