According to National Geographic, the planet Mars is visible without a telescope on many clear nights. The planets Jupiter, Mercury, Venus and Saturn are also viewable without the aid of magnification.
Emotional cheaters usually feel zero guilt for their extramarital relationship. But that is the very definition of emotional infidelity, and the word infidelity is used to describe this type of relationship for a reason... It breaches the bonds of marriage. Even if the body remains monogamous, the heart does not.
Opportunistic infidelity occurs when a partner is in love and attached to a spouse, but succumbs to their sexual desire for someone else. Typically, this type of cheating is driven by situational circumstances or opportunity, risk-taking behavior, and alcohol or drug use.