Alcohol, sexual arousal, and self-control.

The effects of alcohol on self-regulation were investigated using delay of gratification for viewing time for an erotic film as the primary dependent measure. Other measures included reflection--impulsivity, locus of control, sexual-guilt scores, and continuous recording of subject's penile tumescence. Using a balanced placebo design, subjects were led to believe that they had consumed an alcoholic or a nonalcoholic beverage, and half of each of these two groups received either alcohol or tonic water. In addition, the effects of three doses of alcohol (placebo, low dose, high dose) were investigated. Instructional set, regardless of drink content, resulted in longer delay times and increased thoughts with sexual content. Although there was no significant relation between increasing dose of alcohol and delay time, there was an interaction between locus-of-control scores and alcohol dose. Externalizers showed an inverse linear relation between increasing dose of alcohol and delay time. Internalizers showed the opposite trend. Implications for the self-regulation of sexual behavior under the influence of alcohol are discussed.