Durvasula said cheating is “not the norm, but not uncommon,” with some estimates as high as 35 to 40 percent among those in long term but non-marital relationships and perhaps closer to 15 to 20 percent among marital relationships.

However, the psychologist noted this research is limited because it may not account for the full range of infidelity, including emotional infidelity, online infidelity, as well as “what sexual or intimate behavior qualifies” as infidelity.

Durvasula also said: “In addition, the research is often heteronormative, and doesn’t capture this experience in LGBTQ+ relationships.