Changing attitude toward your relationship: more argumentative, critical or distant - less affectionate - increased need for "space".

Unexplained absences: staying later at work: leaving the office for lunch more often - spending more time "with friends" or pursuing a new hobby during evenings and weekends - frequently off running lengthy "errands".

Increase in personal expenses: seems to go through pocket money at a faster rate - credit card spending jumps.

Changing telephone use patterns: spends more time on the phone: seems anxious to be first to answer phone when it rings - mysterious incoming calls, hang-ups, "wrong numbers" - suddenly "needs" a new cellphone or pager.

Greater attention to personal appearance: begins a crash diet or exercise program -- trendy new wardrobe, fragrance, hairstyle or nails.

Added interest in the mail: wants to limit your access to it, especially phone bills, bank, and credit card statements - personal letters (but probably not postcards) from a long-lost "friend" or "relative".

Articles of unknown origin: slips of paper with names, phone numbers, dates/times/locations stashed in pockets, wallet or purse - receipts showing unmentioned purchases - matchbooks from unknown bars or restaurants - strange cigarette, gum or food wrappers in vehicle.

Mysterious bite marks, bruises, scratches, skin irritations: can't explain how "that got there".

Changing sex drive: decreased interest in sex - more aggressive/hostile during sex and less tender/romantic - newfound knowledge regarding a previously unexplored technique or position.

Unexplained odor or stain: comes home smelling of cologne or tobacco that is clearly not their own - lipstick on shirt collar - stained clothing.