I am a 16 year old girl from India and my boyfriend has just turned 18. He had half inserted his penis inside me for the first time we tried having sex and nothing happened. The next time he inserted the full thing inside me but I felt no pain and I did not even bleed. But I was a virgin. How is this possible? Also I want to know if it is unsafe for me to have sex now. Can it cause any kind of problems? Please let me know.