No one can resist the Sex tester card Don't underestimate the power and pull of this little card. It's simple, it's fun, and it's something your participants can carry away and use, over and over again. Just hold your thumb onto the Sex Test Card indicator for about 15 seconds, until it changes color. Blue - you're calm, love to have sex! Green - you're normal, you like to have sex! Red - you're tense, don't like to have sex! Black - you hate to have sex, you need to relax! Detail: We can offer the regular size or produce according your specific designs. It is made as durable plastic temperature indicator. A liquid crystal square changes color when the fingers warmed it, indicating Stressed, Tense, Normal or Calm. Anyone having anxiety can benefit from the Sex tester card and Make relaxation training fun and inexpensive. A liquid crystal square in the card changes colors on touch. -Customized design is welcomed -Any shape is available