Lets take the thing further into analogy. Church. One can worship in Church. One can also sing and talk, laugh and even 'study'. One can explore nuances of Faith, Trust, Hope and Charity. In the Catholic Mass the deep worship aspect is the central feature with a whole build up to the climax replete with song, and a slow resolution phase. It doesn't all have to be dour and serious.
Sexual play can be fun. One can 'study', know oneself and get to know the 'other'. One can change roles, exchange submissions, to experience some part of some facets of each other. If boredom sets in it is because the other and oneself has ceased to be interesting, or maybe even threatening. A significant aspect of sex is man and woman knowing themselves through the prism and interaction of the other sex. Faith, Trust, Hope and Charity. Same sex couples miss out on this opportunity, an opportunity which is vital for propelling a human being up his and her spiritual path.
This is one of the most exceptionally evil aspects of Radical Feminism. The destruction of FTHC between the sexes.