You see, in spite of seeing it as a normal thing, I'm still hit by a downer when I'm done. I get thoughts about how 'I don't want to do that again', or 'I just wish I could overcome my male hormones' etc. I'm just hit by quite an unpleasant feeling after doing it, no matter how enjoyable the 'doing' might have been.
And you're right, I do feel the energy in my body drop, but I'm quite sure that the feelings I get are unrelated. I just feel so down after it.