Indian penis size states between 4 to 5 inches

A study in 2005 stated indian erect penis size on avg is 4 to 5 inches. and the worldwide avg is 5.75 inchesHere is the rest of the world in 2005: 

Penis Size Around The World
Flacid length/erect length (in inches)
United States 3.4/5.0 
Germany - na/5.6 
Spain - na/5.3 
France 4.7/6.2 
Japan 3.1/5.1 
Brazil - na/4.8 
Italy 3.9/5.9 
Venezuela 3.7/5.0 
Mexico - na/5.9 
Greece - na/4.8 
India - na/5.0 
Saudi Arabia - na/4.9 
Chile - na/5.5 
Colombia 3.5 5.4 
Korea 2.7 3.7 
from wikipedia: 

Size

Results from LifeStyles condom manufacturer's study of penis size, displayed in inches. The data is listed by percentile (i.e. a male with a 6 in (15.24 cm) penis is greater in length than 70 percent of those measured.)

Main article: Human penis size 
While results vary across studies, the consensus is that the average erect human penis is approximately 12.9-15 cm (5.1-5.9 in) in length with a 95% confidence interval of (10.7 cm, 19.1 cm) or (4.23 in, 7.53 in).^[27][28][29] The typical girth or circumference is approximately 12.3 cm (4.84 in) when fully erect. The average penis size is slightly larger than the median size (i.e. most penises are below average in size). 
A research project, summarizing dozens of published studies conducted by physicians of different nationalities, shows that worldwide, erect-penis size averages vary between 9.6 and 16 cm (3.8 and 6.3 in). It has been suggested that this difference is caused not only by genetics, but also by environmental factors such as culture, diet, chemical/pollution exposure,^[30][31][32]etc. Endocrine disruption resulting from chemical exposure has been linked to genital deformation in both sexes (among many other problems). 
The longest officially documented human penis was a find by Doctor Robert L. Dickinson. It was 34.3 cm (13.5 in) long and 15.9 cm (6.26 in) around.^[33]

Read more: http://wiki.answers.com/Q/What_is_the_average_size_of_indian_male_penis#ixzz16wHz11s3

http://www.ehow.com/how_5288242_keep-relationship-exciting-new.html

Make love often. This is a tough one to do in a relationship because work, kids, and household chores don't always leave time and energy for sex with your partner. But, sex is important in a relationship and should be made a priority. Try making a plan to make love at least twice a week: once during the week and once on the weekend. Stick to this as best you can so that you and your partner know that when to expect intimacy. While this isn't always romantic, you can make it so by turning on some soft music, lighting candles, or taking a bubble bath together. Making love will keep you and your partner close and keep the relationship new and exciting. Without sex, a relationship becomes dull and partners become more like roommates than lovers. It's important to make sex a priority so that both partners feel a connection to one another. By making love at least twice a week, you'll keep the spark a live and help your relationship to become exciting and new again.