#1.) Her cell phone number. 54% of men don’t know it.

#2.) Her favorite song, 54% of men don’t know it..

#3.) Bra size, 39% of men don’t know it.

#4.) The specific date you met, 35% of men don’t know it.

#5.) Favorite perfume, 34% of men don’t know it.

#6.) Where she went to school, 28% of men don’t know it.

#7.) Her favorite clothing store, 24% of men don’t know it.

#8.) Shoe size, 23% of men don’t know it.

#9.) Dress size, 23% of men don’t know it.

#10.) Underwear size, 20% of men don’t know it.

#11.) Who she considers her best friend, 20% of men don’t know it.

#12.) Her allergies, 20% of men don’t know it.

#13.) HER BIRTHDAY, 12%. That’s about one in eight, by the way.

#14.) Her natural hair color, 11% of men don’t know it.

#15.) Her official job title, 10% of men don’t know it.