Both, It doesn't always have to be a spirtual event. Sometimes it's just fun.
Like Jim says, it can be either.
Love and commitment. No question.
Sex can just be purely pleasurable, but for me personally to thoroughly enjoy it as such, I need that special connection with my partner.
Maybe not love and commitment necessarily but it has to be a person that means something to me and not some random woman. The pleasure part is not that hard once you get experience.
I agree with Jim! Sometimes it's just fun! It's not always about love for me!
Which is why I have a real problem with people claiming "I'm a sex addict". Bullshit. They just want to fuck without consequences.
It can be either or both, but if you experience neither you better get the hell out of there. Ha!