Men don't automatically think you're unattractive...but there are certain things you can do or say that will make you appear unattractive to them. Ladies, remember that first impressions really do leave an impact.

Women seem to notice everything that is "wrong" with another woman. They can easily spot any makeup disaster, ugly hairdo or tacky outfit. Ladies – brace yourselves and prepare for some home truths; here are the things men find unattractive about women.
1. Too much makeup

women that look like they have a mini cement mixer for the foundation they slap on.Keep it natural. Men don't want to go in for a kiss and come out looking like they just joined the circus. Remember, foundation is supposed to be invisible to others and blend in with your skin. Stay away from glittery or shimmering eye makeup and never use clumpy mascara. Minimal makeup is sexier.

2. Mouth odour

Bad breath and discoloured teeth are unattractive to the opposite sex. Cut down on the coffee or red wine. Use whitening toothpaste or strips to brighten your smile and always carry gum or breath helpers in your purse. You never know when that kiss may be coming.

3. Poor hygiene

Poorly manicured nails, hairy legs and unshaven armpits are major turn-offs for men. Poor personal gygiene cannot be hidden by makeup or cloth.

4. Negativity

Men like happy, positive women. So don't complain about the lack of service at a restaurant or how long you had to wait in a line. Show your upbeat personality.

5. Being needy

Don't ever drop your girlfriends and family for a man. Being too dependent on your man to make you happy is a turnoff. Expecting him to change to meet your needs is also very unattractive. They want to be loved for who they are.

Source: http://nigerianewsonline.com.ng/5-things-men-find-unattractive-in-women-especially-no-2/