A US survey of new mothers:
In a survey of new mothers in the USA, hygiene and appearance were the two major reasons for choosing to have their newborn son circumcised [Williamson & Williamson, 1988]. There was a strong correlation between their son's circumcision status and the woman's ideal male partner's circumcision status for intercourse. Thus by being circumcised they thought that their sons would likewise be more attractive to a future sexual partner (with the implication that they would be at an advantage in passing on their, and therefore the mother's, genes to the subsequent generation). Their own preference thus affected their choice for their sons.
In this US study, 92% said the circumcised penis was cleaner, 90% said it looked "sexier", 85% it felt nicer to touch and 55% smelled more pleasant. Even women who had only ever had uncircumcised partners preferred the look of the circumcised penis. versus uncircumcised was 71% versus 6%, respectively; manual stimulation, 75% versus 5%; visual appeal, 76% versus 4%.
What then is sexier about a circumcised penis? Quite likely it is that the glans is exposed in both the erect and un-erect state.
http://www.circinfo.net/socio_sexual_aspects.html
Canadian survey of mothers:
In Canada the reasons mothers gave for getting their infant boys circumcised were health or hygiene 44.4%, to be like their father, siblings or peers 35.6%, religion 17.3% and other reasons 2.7%
Australian survey of parents:
A survey in 2007 of parents who were having their sons circumcised in a circumcision clinic in Melbourne found that the most common perceived benefit was hygiene (96%) [Xu & Goldman, 2008]. Other reasons were family tradition (57%), medical benefit (36%) and esthetics, with 14% believing it improved sexual performance/enjoyment as an adult and looked better to women
Women’s preferences and sexual satisfaction:
As mentioned above, the gold standard of epidemiological evidence is the randomized controlled trial. One, involving 455 women, found that the overwhelming majority (97%) of women reported either no change (57%) or improved (40%) sexual satisfaction after their male partners had been circumcised [Kigozi et al., 2009a]. The authors concluded that male circumcision has no deleterious effect on female sexual satisfaction, and that it might, moreover, have social benefits in addition to the established health benefits. Speculation about any possible adverse effect on female sexual satisfaction was dispelled.
Women with circumcised lovers were more likely to reach a simultaneous climax - 29% vs. 17% of the study population grouped across the orgasmic spectrum of boxes for ticking labeled "together", "man first", "man after" and "never come"; some ticked more than one box.