Hello, so I've been with my partner for 7 years now and it's hard for me to come! He has to give me head in order to come! And it didn't have to be like that! Even though I love it don't get me wrong but what if it is because feeling change? We have done it so many ways and the only way for me to come is head or a lot of concentration on military style! What r some tips? I need to do it other positions and come and I can't!!