When i am alone i get many thoughts of doing sex and I do hand work and make myself satisfy, and I like to do sex but when my partner is in front of me and when I started doing romance my penis gets active as usually, but in between my penis drop down before inserting it into Pussy not sure why is this happening with me. Suddenly I get cool sweat and my penis drops down. I tried doing sex 5 times till now, from these only one day I was able to satisfy her that too first time I failed at that time and after some time I was successful Can some one help me detail what's the actual problem is?