Meth is a strong stimulant often used recreationally as a party drug. Among the effects reported by meth users is an increase in the need and urgency for sex, the ability to have sex for extended periods, and an inability to ejaculate or reach orgasm or physical release. In addition to increasing the need for sex and enabling the user to engage in marathon sex sessions, meth lowers inhibitions and causes users to behave recklessly or to become forgetful.
According to a San Diego study, meth users often engage in unsafe sexual activities, and forget or choose not to use condoms. The study found that meth users were six times less likely to use condoms.
The urgency for sex combined with the inability to achieve release can result in tearing, chafing and trauma (such as rawness and friction sores) to the sex organs and the rectum and mouth, dramatically increasing the risk of transmission of HIV and other sexually transmitted diseases.
Meth also causes erectile dysfunction (sometimes called crystal dick) which often leads people to decide to engage in receptive anal sex or fisting.