With regard to women's overall sexual behavior and sexual satisfaction, Masters and Johnson's 1979 study on lesbian sexual practices concluded that lesbian sexual behaviors more often have qualities associated with sexual satisfaction than their heterosexual counterparts, focusing on more full-body sexual contact rather than genital-focused contact, less preoccupation or anxiety about achieving orgasm, more sexual assertiveness and communication about sexual needs, longer lasting sexual encounters and greater satisfaction with the overall quality of one's sexual life.[7][8] 2004 research by Margaret Nichols found slightly less sexual behavior among lesbians than heterosexual women, but that both were sexually active approximately once a week.[4][10] Several studies have indicated that lesbians have orgasms more often and more easily in sexual interactions than heterosexual women do,[14] while a 2009 Journal of Sex Research study found that women in same-sex relationships enjoyed identical sexual desire, sexual communication, sexual satisfaction, and satisfaction with orgasm as their heterosexual counterparts.[15] 2014 research by Blair and Pukall reported that women in same-sex relationships have similar levels of overall sexual satisfaction as their heterosexual counterparts, and slightly lower levels of sexual frequency, but also that women in same-sex relationships spend significantly longer amounts of time on individual sexual encounters, often spending upwards of two hours on an individual encounter.[16]