fucking

Anal Sex -  One of the first mistakes to make is using no lube. Often this first starts by just putting a finger up there. You get in by  will power and its sort during and after. Next time you spit and push. Just because its lubed on the outside, what makes you think its going to be lubed on the inside? There is no substitute for enough lube. You can never have enough especially when beginning. You can use hand cream to start with because that is in the bathroom any how.
You can also use cooking fats which don't dry out. From a hygiene point of view you should use water based lubricants such as KY gel (its used for me that just sex, so if you buy if don't go red faced - they cant mind read).
When you lube a guy up its best to use lots of foreplay to relax the guy - lots of kissing and licking helps, stroking with your finger or easing your thumb in helps. Make sure your nails are cut sort and are clean - you don't want to shove a dirty knife up his butt hole do you?
It also makes sense to go to the toilet first to ensure that you are empty, so that no surprises come out - later on when you get into deep fucking you will likely douche your butt out so that it is quite empty.
When you come to fuck a guy, not only do you need enough lube
You need a condom/durex because.

• You don't want the risk of catching anything.
  Because you don't want to have to go to the family doctor.
  Because he might ask question that you might not like, he would tell your parents, even though often he should not. You might find it hard to get the courage to go to a mans sexual health clinic.
  
  This also means that you dont want to risk any other infection that cannot be cured with a pill.
  Do not be under any illusion about HIV, just because you are young it does not mean that you cannot get it. Likewise a mate I know got it the very first time he got fucked - just because he really fell for the other guy, he believed the crap about you cannot get infection of the first date.
   
• It is very easy to get NSU infections. You can drink a glass of Cranberry juice a day and this will Teflon coat your piss pipe in your dick so few common bugs can stick to it. But there are many causes of NSU infections - like wanking too much through to be allergic to some shower gels. The NSU is a Non-Specific infection, so if your dick is irritated it can generate a reaction which results in an NSU.  
   
• Just because it reduces sensitivity of your dick, dont give up, try lots of other types - this is a time of experimenting and discovery in your life. Condoms for gay sex are the 'Extra Strong' type. This is because we tend to have more dynamic sex, also the HIV viruses can pass thro some of the thin condoms. you can get extra thing plastic condoms which are stronger than rubber but not quite so common.
  You can also get condoms that also go around the balls as well. These are quite horny so there is no chance of the condom slipping off, and its a step closer to full body rubber coverage :)

After you have been fucking, there may still be some lube up there so you might want to go to the toilet again or ensure that you are cleaned up. If you do go fucking on your bed, make sure that you do it on a towel (not white) so that if anything comes out its not on your bed sheets. Which can you wash or hide A towel or bed sheets?
If you have your aces covered you can relax and think about one thing nd not be worrying about anything else.
Likewise if you cannot lock the door, drops some clothes behind it so it will jam the door if anyone tries to come in. You will have taken other precautions like ensuring you have the house to yourself, or that they would have to make a noise which would warn you so you have time to take action.
Dont worry the first time it is always clumsy - you are not taught this in school.
It gets better with practice just relax. The male 'G-Spot' is about 2 inches inside his butt, when you fuck him right you are rubbing this and he can cum without touching his dick. He can also have body orgasm just like women do. Once you have got the technique right, then try it with the guy tied down totally immobile - the orgasms will be more intense. Then try it with him gagged and blindfolded. Him mind will focus more on being fucked, you can then talk dirty to him and stimulate his imagination. You  can now add a lot of teasing, what I love is after a few thrusts into his butt hole it to hold the throbbing dick outside his butt hole, just pushing against the hole - he is tied down and he will do anything to impale himself on you.
Later you can explore Tantric sex when you makes it last hours.