Don't feel like having sex. no stress, not on medication, not having an affair. any other reason? any medication to enhance sexual desire?

No desire for sex: First would rule out any medical conditions that can affect libido. Then might explore ways to enhance mental intimacy as a precursor to other forms intimacy. Would evaluate medications as last resort and only after consulting your physician.

See below: Please contact your obgyn or primary care doctor to ascertain if there are any physical causes for your loss of libido and take things from there. Good luck!