eyes closed, head first, can't lose

I have no willpower. And thus: am going to take part in the Merry Month of Masturbation 

But, um, first: I have an embarrassing question. What, exactly, counts as masturbation?  Where's the line between mutual masturbation and sex? Is it no contact with a partner at all? What about taking directions from a partner? Does frottage count? What about one partner pinching the masturbating partner's nipples? Help me! I am confused. :-/

Pairings/people I'm planning on writing:
Alec (from Dark Angel)
Neal, Neal/Peter, Neal/Peter/El, Neal/Moz, Neal/Kate, Neal/June
Tim Riggins (from Friday Night Lights)
Warren Peace (from Sky High, SHUT UP)
Troy (pre-Troy/Abed, from Community)

If you have prompts for those fandoms/people, or just random ideas, please comment and let me know! I know a lot of you have already asked/given prompts in your own LJs, you can just link me there if you don't want to write it out again. I'd appreciate any ideas/scenarios/words/techniques you can give me! Short, random, kinky, TMI - all comments (including anon!) would be super, super helpful. Thank you in advance! :D