I'm not sure whether my voice matters, but as an ongoing MtF (and thus born as a male), but is exactly how men feel about sex. Same for the will to fight.
Sexually speaking first: if I wanted to be blunt and short, I'd say that men just want to "empty their testicles". The act is great and all, but there is an actual need to "impregnate" - as you put it - your partner. This is a physical need, these thingies have to be emptied regularly. It's like when you want to eat chocolate or something I guess: you aren't going to die if you don't eat any, but you'd still definitely kill for some. This can be strengthen even more when there's baby stuff going on. You want to try again and again and again 'till it works... Except if you don't want any. In that case, yeah, I guess you just want to run away because you know this is getting dangerous.
Basically: even though it depends from man to man and evolves with age, sex for men is first about emptying their tank before having a really long good time. That's why some ejaculate prematurely, or you see these guys wanking their monkeys like it was some kind of Mario Party mini-game.
Men are also likely to be more "aggressive". The basic feeling is that they want to own the world, they want to prove their own strength. Well, this is true mostly for big dudes and all, but yeah. You have to move your body, to show your strength or something. This is indeed how men feel.
Then again not all men are like this, but it is definitely true that most of them just want to empty out their buckets. There's nothing to do about it, it's a physical thing. As for the fights and all, it depends, but men are definitely more likely to be aggressive.
