I can relate to you feeling a bit 'confused'/on the fence.

I think it is very important that sex is a two-way street. You need to encourage the other person that what they are doing is actually pleasurable. I find myself moaning, or talking (Not a lot, just a few moans), or my body will naturally move and 'squirm' in pleasure. I would also play with my partners hair. and maybe try pleasure him/her at the same time.