Boyfriend has "peaceful" orgasms

Today I asked my BF why he doesn't have intense orgasms like he used to when we first started dating. He told me that sex is more or less peaceful for him and feels like a release and send happiness and calmness over him. But he said he doesn't necessarily 'feel' his orgasms, like they don't make him spaz out like other guys. His cum just releases out. He doesn't make noise really or look like he's very much so enjoying himself, even though he says he is.