Yan Yu warmed the cold lubricating liquid with the temperature of the palm of his hand.

He solemnly explained, "The lubricant must be warmed by your own body first, otherwise it will be smeared coldly - that is not fun, that is called failure." ”

Lan Weiyan watched him dip his thumb in some thick crystal liquid, and twisted it twice with his thumb to pull out a silver thread.

A serious tone, extremely lascivious hand work.

With the old man's slightly drunken and slightly confused eyes......

Lan Weiyan was so excited that his body couldn't stand the slight trembling.

Yan Yu knelt on the bed, "Like this one, because it is pectinous, the lubrication effect is not as good as that of silicon-based, but it is more than enough for me to use." ”

Lan Weiyan moved his gaze to Yan Yu's lower abdomen and slowly went down......

He shuddered again.

…… The old man also underestimated himself too much.

"Do you want to change to silicon-based?" Lan Weiyan tried to make amends.

He was afraid that he would faint from the pain.

"Silicon-based ones are a bit cumbersome to clean and can ruin condoms. If you don't pay attention, it's easy to stain the sheets. Yan Yu shook his head.

"That's ......," Lan Weiyan nodded in benefit.

"Hey, little handsome guy, you really don't have to worry. At most, it hurts a little bit. With the skill, pain can be avoided. Yan Yu said soothingly.

He thought that Lan Weiyan was afraid of hurting himself.

"Oh......" Lan Wei said as if he understood, "then do you want to start now?" ”

"I'm not done teaching yet," Yan Yu pointed to the beautiful boy's leg with his chin, "Get down." ”

Lan Weiyan's face flushed, and he obediently lay on the bed.

"I'm just demonstrating it now. Wait a minute, it's your turn. Yan Yu's fingers smeared some lubricating fluid and put it behind the beautiful boy.

Lan Weiyan snorted.

"The pectin is similar to the water-based one, which is more natural, but it is volatile, so if the staying power is good, it usually needs to be reapplied."

Yan Yu popularized science on the one hand, and drew circles slowly and methodically with his fingertips.

"Oops...... It's spicy! Lan Weiyan shrank his body and gritted his teeth and snorted.

"Young man, I can't stand this little stimulation, how can I play anything else?" Yan Yu smiled sinisterly, "The mint flavor is your own choice." ”

Lan Weiyan struggled for a moment, and slowly relaxed his body.

Just as he was about to get better, Yan Yu withdrew his hand again.

"Did you learn?" Yan's tone seemed a bit like the mantra of a professional professor - "Am I clear?"

was so frightened that Lan Weiyan suddenly lost interest.

Yan Yu wiped his hands, "Before you go in, you must do a good job of expansion." Otherwise, both of them are in pain and very unhappy. ”

Lan Weiyan rolled over, his brain staring at the ceiling with oxygen in his head.

The elegant ceiling that matches the space is painted with lifelike dandelions, and the soft light of the flower-shaped chandelier is reflected on it, giving it a sense of unreality.

Yan Yu continued to chatter, "...... Well, that's pretty much the basics of expansion. You can take your time to find ...... feeling."

"Brother Xiao Yan, did you use to be a teacher?" Lan Wei asked resentfully.

"Uh......" Yan Yu frowned, "When I drink too much, I talk a little too much." Annoying you? ”

"It's not annoying...... Lan Weiyan rubbed Yan Yu's shoulder, "If you were my teacher, I would definitely not fail the course." ”

"I'm your teacher now." Yan Yu's tone is ambiguous.

Lan Weiyan bit his shoulder blade dissatisfiedly, "Don't teach me with these theories. ”

The tip of the beautiful boy's soft tongue swiped nimbly on the old man's shoulder.

Yan Yu circled the boy and asked knowingly, "Then how do you want me to teach you?" ”

"Uh-huh~ Teach me with action."