Leo is immediately distracted by the prospect of a naked Sasha, whom he kisses and touches with great enthusiasm. 

Things that Leo apparently finds fascinating, judging by his little gasps and the kisses he lavishes on them: the freckles on Sasha's shoulders, Sasha's hipbones, his third rib, the skin around his bellybutton.

Leo is very good. This isn't a surprise but Sasha wants to make extremely sure that he knows it; he whimpers when Leo kisses his shoulders.  

Leo tentatively tries biting his shoulders.

He gasps and moans and the muscles in his torso tense up involuntarily and his head tilts to the side to give Leo better access.

He's going to do more of that, then.

(His underwear is soaked through, and he's very obviously hard.)

Sasha keeps moaning and keeps shivering and reaches down and touches him through his underwear. 

Leo gasps.

"It's nicer... when you do it..."

"It always is," he whispers, and pulls Leo's underwear down and keeps touching him. 

Behind Leo's balls is a very compact vulva.

Sasha might not be very experienced with vulvas, but he's probably at least seen enough diagrams to know that the clit is not supposed to be right next to the vagina. 

That's also interesting! 

He keeps touching Lev's dick, keeps kissing him, says "What do you want?" into his mouth. 

"Want to make you feel good."

Sasha kisses him again, deeper this time, and pulls him forward and — Leo's so wet — 

He is so wet, and tight especially around the opening, and it feels like his vagina is almost sucking Sasha in, and Leo throws his head back and moans and says "more, please, more--"

Okay — okay — he can have more — Sasha can give him more — 

"It feels so good-- Sasha, please--"

"I — I don't know what you're asking for — you can have it but I don't know what it is —" 

"Fill me up, fuck me, make me feel good-- Sasha, please--"

His dick is so so hard. Precome is glimmering at the tip. He bites Sasha's shoulder.

Sasha fucks him and fills him up and touches his dick, rubs his thumb over the slit and lets his hips jerk — 

His hips are thrusting up. He's lost the ability to speak English, he's just moaning and hissing and making vowel sounds that might be part of a "Sasha" or a "please" or a "love." His teeth are in Sasha's shoulder and his hands are on Sasha's back and he feels so good and he wants-- something-- but it feels so good it's hard to think about what it might be.

"Love," he says, and "yes," and "ah," and something in Russian that Leo doesn't understand. 

He's not very good at understanding English either so that's all right.

Sasha's touching him, Sasha's stretching him out inside, Sasha is happy with him and loves him and he's making Sasha feel good, he's doing something right, he's being a good slave, and it keeps feeling like it's about to reach a peak and not quite getting there and instead leaving him incoherent and aching and needy and so so happy.

And Sasha's hips jerk and he presses his face into Leo's shoulder and clings and moans and says "I love you" in Russian and finishes inside him and, and. 

He made Sasha finish because he's good, he's a good slave, he made Sasha happy, and it feels like he's floating in a haze of pleasure and wanting and need.

Leo makes a little noise of protest when Sasha pulls out.

Sasha kisses him and keeps touching his dick, reaches back with his other hand to touch his clit. 

Sasha is so good. Does he know that he is very good? Leo is incapable of expressing this sentiment in English but maybe the moans will help.