Piplover asked a very good question: If, when they're older, and they asked, you could give one piece of advise to the boys on sex, what would it be? Not necessarily based on your own experience, but something you wish you had known, or someone had told you when you were younger.
So...I shall try to answer. It's a bit...difficult. And I talk a bit about sexual assault, so I don't want to upset anyone - dont read it if you don't want.
My advice would be...always have the courage to say 'no'. Which sounds...obvious, I suppose? But there's a great difference between saying to yourself "of course I'd say no!" and then actually...saying it. There is also a great deal of difference between the other person(s) hearing it and heeding it.
But it's never too late, or the wrong time, to say it. You never owe it to anyone to go through with sex just because you've started. You should never worry about what they'll think of you for saying 'no', no matter how far along you are. And always, always listen and heed it yourself, if your partner says it. Never think "well they might say that now, but in a minute they'll realise how great this is" or any other shit like that.
And it doesn't matter who the person is - a total stranger, a friend you've known for years, your spouse, whoever. If you don't want to do it, it's never ever wrong or bad to say 'no'.
That said, if you find yourself in situation where someone has forced you into doing something you didn't want to, then don't ever blame yourself, no matter how you reacted. In some situations you have to, for self preservation, go along with things to some extent to prevent yourself being injured or even killed. Some people freeze, no matter what they thought they might do. It didn't mean that you wanted it. It makes it no less wrong.
Equally there is no wrong way to feel if it happens. Some people cope on their own, some need to talk to a professional, some just need to talk to friends. Some people want to talk right away, others won't for a while - some won't ever. Some people move on quickly, others take years to feel anything like normal.
I know, being boys, they're statistically less likely to ever need this advice. But people are complicated and hard to read, and they say one thing and mean another. And I'd never want either of them to feel pressured into anything by their peers, society, or another individual.
So yeah, that's my advice. Probably not written as eloquently as I'd like. It's taken me all day to get that far, as the time stamp shows.