D.O.D. [Updated]

Dick on demand. It's an interesting development to have in one's life, and I seem to be developing it in my own. 

I'm trying to figure out how it works. How do I refer to this? We're friends, I suppose. He is someone I have been friendly, at least, with for a few years. Does that make us friends with benefits? I feel like, ideally, a friend with benefits should be a closer friend than this. Like, a person you would hang out with on an one-on-one level and are also sleeping with. Me sitting here wanting to text him to see if he wants to come over feels more like we're fuck buddies.

...What exactly is the difference? 

UrbanDictionary will tell us!

Friends with benefits: 1) Two friends who have a sexual realtionship without being emotionally involved. Typically two good friends who have casual sex without a monogomous relationship or any kind of commitment. 2) two fairly close, or very close friends have the hots for one another. they do have some sort caring for one another, but it is not one of a romantic couple. 3) Two very good friends that share in sexual acts with eachother with no emotional connection or boyfriend-girlfriend label. Just engaging in the act of sex for fun.

Those all sound well and good except for the "typically two good friends" "fairly close, or very close friends" "very good friends" parts. Let's see what it says for fuck buddy: 

1) A sex partner to whom you have no special attachment. A person you occasionally have sex with who is not your S.O. 2) A person who is not your boyfriend or girlfriend (or farmyard animal), with whom you have sexual relations, on the mutual understanding that you both want sex and nothing more. Strictly, for the term 'fuck buddy' to apply, both people involved have to be single. 3) All the benefits of being in a relationship minus the bullshit like not doing enough for Valentine's Day or her birthday, not spending 3 months salary on a stupid ring, and not spending enough quality time with her. 4) The excellent arrangement of a good friend of the opposite sex (or same sex if you so want) who you can fuck hard and long as long as you both shall want, but without the strings attached so you can go and happily hang out together as friends and have a laugh together (or not see one another for another 4 weeks) rather than go through all the pointless crap of forking out your hard-earned cash for valentine's day or bitching about each other's annoying habits in public or being dragged away from your friends to spend quality time with one another (or do the washing up) or the "I wuv you - I wuv you too!" bullshit.

(Number four included just for the lolz.) 

This is somewhat clarifying, but my soph friends who are currently in the Large Library agree with me that FWBs are people with whom one would hang out as friends. I would like some clarification as to whether this means one with whom you would hang out with INDIVIDUALLY as friends or like, in a group as friends, because that is highly relevant to my situation, but hey. 

The point of this post is that whatever this is, beside yay I'm having good sex...I don't know how it works. So he said that when I want to sleep with him, to bluntly tell him that. When can I do that? What time of the day? Only in the wee hours of the morning? How frequently? Should one or both of us have been drinking before? Are there rules?

Can the rule be try it and see what works? I like that philosophy.

[UPDATE: Wee hours of the morning is not a good look. It wasn't even 1AM when I texted him last night to see if he wanted to come over, and he texted me back at 8AM saying he'd been asleep already. Soooooo, that's not gonna work, haha. I'm mad I sat around waiting for it to feel "late enough" and missed my chance. My best friend from middle school is visiting today/tonight, so now I either have to try again on a school night or wait a whole week! Ugh.]