Is it normal he likes to strangle me during sex?
I'm 25, and Ive been with my 27 year old boyfriend for eight months, exclusive for six months. We slept together on the second date, and had a colourful sex life before we were properly together - things were always pretty rough and tumble between us. We fell passionately in love and have a very affectionate relationship, we are both extremely loving and reassuring towards each other - our sex life however has remained filthy.
He's always been very dominant, and into rough sex - he likes to be in control. I mainly dig it too - as we've gotten closer, our sex life has got more and more open and we've grown to understand each other really well. 95 percent of our sex is amazing. However, there are times now and then where I feel as if he is getting sexual pleasure out of hurting me - he won't bother with foreplay or will be too rough pounding me and I feel as if he can hear I'm in pain and almost crying and that this spurs him on - in fairness I never tell him, as I want him to have his pleasure and it's not unbearable and doesn't happen very often. Additionally, he sometimes chokes me during sex - it is always pretty gentle, not enough to scare me or hurt me in any way and I always know I can stop him if I want to. In fact I enjoy it in moderation.
However, the mentality of it frightens me a bit - I read a psychology article a few months ago that said this is a massive warning sign if a guy wants to or tries to do this. What does it say about my boyfriend and the kind of person he is that this turns him on? I'm not being prissy, I really want to understand his needs - why does he like being in control so much? Why does hurting me or feeling as if he can hurt me excite him? is this normal?
I will add that my boyfriend is passionately, obsessively in love with me - he is also very jealous and possessive. He has already said that he wants to have children with me and be with me forever and that he's never felt like this before, I know that this is true and he means this (he's even told all his friends who have joked with me about it) - it's a very intense relationship. I feel that this is relevant. Happy to answer any more questions with helpful people in the comments section.