The missionary position is commonly used the first time a couple has sex. Thomas Stuttaford notes that it may be more comfortable to do so: "The discomfort of early penetrative sex, if there is any, is usually related to tension in the pelvic or thigh muscles and/or anxiety that has prevented the usual vaginal lubrication. Muscles of the pelvic floor are more relaxed if, initially, the missionary position is chosen and a couple of pillows are arranged under the woman's bottom so her hips are tilted upwards." The Lovers' Guide states that missionary lends itself well to sex with a new partner as it is "a romantic yet fairly unadventurous sex position" that is "non-threatening and loving" and "lays neither partner open to strangeness, anxiety and unfamiliarity."