As everyone has said, BE VERY CAREFUL. It will grab you by the balls before you know it, can I suggest sniffing it, plugging it or using it orally? Its less addictive/moreish and less corrosive. I find smoking to be more addictive than injecting and only seems to push the addictive factor up a notch. I find I can go through a point or 2 in a night if im plugging/sniffing or IV'ing(not suggesting you try that) when id easily go through half a g smoking. Yes smoking it is great but really bad for your lungs(as well as everything else) and in the end if your using it for sex it will do the same thing. Plugging meth(fill up a needleless syringe with 1-2ml water, mix up meth and squirt up ur bum lol the high feels better than smoking imo, trust me just try it)
1 point= 0.1g/100mg and if its good stuff that should be plenty for one night if as you say you only have 2 puffs. Though ive had stuff where half a gram(5points) has done less than 0.15g( 1 1/2pts) it really varies but there has been some great stuff around lately. I was getting points not long ago that I probably would have OD'd off if I shot the whole point, was smoking quarter points at a time and getting at least 2 big puffs of each quarter point(for those in the know I really think it was 4-MAR). Some stuff smokes up a lot more too, sometimes you'll get 10 puffs from a point sometimes 2-3 and you know how good it is by how much brown/black crap is left in the pipe, it all depends on what its cut with.
I am a 21 year old gay guy from Sydney(well close enough) and have used meth for a few years now. Please dont think im naeive coz im young because I can gaurantee you ive seen more than most 60 year olds. Anyway meth is probably the most dangerous drug on the scene(and ive been a hardcore heroin/other drugs injector/addict for many years and have tried more drugs than I can remember, im clean-ish now though) and a lot of the guys who use it tend to turn into seedy, sleazy assholes than bareback with no regrets. Im not saying this is every gay guy who uses meth(or even most guys) coz im not like that but I have got myself into some pretty hairy situations due to meth(and me, cant blame the meth). I really hope you dont bareback at all mate.
Anyway yes meth is great for sex but I find im more likely to do something stupid(like BB etc) while on meth rather than E, meth and GHB is an amazing combo, I wish we had more if it up here in sydney, I can never find it but im sure it would more than double the risk of participating in risky behavior. If you do want to try G just do so around some mates in a quiet setting, G makes me hornier than any other drug, sure you can fuck for ages on meth and it does enhance feelings n such but G makes me so horny that its like theres so much horniness my body cant contain it. I can remember walking through a shopping centre with a mate and just wanting to fuck like every single person in there hahaha. G is also really nice for coming down on and relaxing the next day, its one of my favourite drugs(meth is not

)
Just be careful, meth is everywhere in the scene, dont let someone persuade you into injecting it, if someone wants to give you G make sure they only give you 2ml to start off with and watch them dose you coz there are still cunts around that OD people on G and rape them. Stay safe and know what your doing and what your getting. I like to bring my own drugs out to be safe, obviously theres those times when someone offers you a line, a pill or a charge and im not going to lie most of the time I take it but ive always got close friends with me. If in doubt, throw it out or just say no thanks

dont want to hear of you dying just coz some fuckwit wanted to fuck you. Sorry if im a little incoherent, just been on a bender and recovering today so sorry if u need any other questions answered about drugs/gay stuff pm me

.... BTW English accents are HOT! hehe
Id love to have a chat with you mate, been thinking about checking out a sex on site venue but not sure whether I want to go alone, ive chickened out too many times lol

PM me or ill get to you mate.