It is an odd situation, as I really do enjoy sex with my DH but over the course of our 5 year relationship... I would say I have orgasmed 5 times and all in early months.
The only way to really 'prove' to DH that I am enjoying myself is to fake orgasm. I enjoy the intimacy, I enjoy the physical sensation, quite often I initiate sex, I just do not orgasm - yet I lead DH to think I do 99% of the time. No point discussing it
What are other people's experience like re. this issue? Do you ever fake it? If so, how frequently?