Sir, i am a married man with 28 years old.my wife is 19 year old.we both are very interested in sex.our marriage was 2 months ago.we are trying to do intercourse daily since our first night.but,i couldn t insert my penis inside her vagina.my penis is very strong but,even then i couldn t do that yet.she is in very pain,when i try to do that.so,we are very disappointed and tensed.pls give us some advice to rectify oyur problem.