Treas and Giesen found that people who had stronger sexual interests, more permissive sexual values, lower subjective satisfaction with their partner, weaker network ties to their partner, and greater sexual opportunities were more likely to be unfaithful.
Studies suggest around 30–40% of unmarried relationships and 18–20% of marriages see at least one incident of sexual infidelity.
Interviews with people in non-monogamous relationships since 1972 by the GSS have shown that approximately 12% of men and 7% of women admit to having had an extramarital relationship.
Results, however, vary year by year, and also by age-group surveyed.
There is also the White Beach that, as its name suggests, is a stretch of white sand beach just minutes southeast of the seaport. The clear, deep, blue waters (even during low tides) are excellent for swimming and diving.
The Bomba Beach, located in barangay Bomba some 2 kilometers away from the city, is also a good area for swimming and fishing, with a bomba bridge and natural coral reefs.
In one study by Blow, rates were higher in more recent marriages, compared with previous generations.
Such covertly illegitimate children amount to about 1–2% of newborns in studied populations.
According to The New York Times, the most consistent data on infidelity comes from the University of Chicago's General Social Survey (GSS).
A study by Liu found that the likelihood for women to be involved in infidelity reached a peak in the seventh year of their marriage and then declined afterwards; whereas for married men, the longer they are in relationships the less likely they are to engage in infidelity, except for the eighteenth year of marriage, at which point the chance that men will engage in infidelity increases.
One measure of infidelity is covert illegitimacy, a situation which arises when someone who is presumed to be a child's father (or mother) is in fact not the biological father (or mother).
The coral reefs are artificially made, but the whole place is very much ideal for swimming, fishing, and boating.