Why Mercury and Venus have no satellite?

Mercury has no satellite.
There are 181 satellites in the solar system. It has, however, kept the satellites of the dwarf planets. Roundabout to see 19 satellites. As a result, if they were no other planet or satellite of the planet of dwarf, they could get the title of the planet directly. But there are no satellites in Mercury and Venus, but there are so many satellites in the solar system.
On the other hand, the Earth has only one satellite - the moon. Mars has two satellites named Demos and Phobos. Jupiter has the highest satellite - at least 67 Notable among these are Io, Europa, Gannimid and Calisto. Saturn is not behind. It has occupied 62 dunas (the satellite is sometimes called the moon). Uranus and Neptune have 27 and 14 moons respectively.
Pluto is no longer a planet, but he has a satellite. It's not even two, five-five. There are no moons between the dwarf planes of Ceres and Makimaki. But apart from Pluto, there are two and one moon in the other two planets, Homaya and Eris respectively.

But Mercury and Venus have no satellite or moon?
The main possible reason is that they are very close to the sun. A satellite situated very far away from the planet's orbit fails to become stable orbit. As a result, instead of being attracted to the planet, the sun responds. And if it is very close to the planet, then the planet's strong attraction is unified with the planet. The area around these planets could have a safe orbit for the satellites, perhaps the region is very narrow, so no one could achieve it.
Another explanation is similar. Most of the satellite's satellites have been formed due to the occupation of planets by asteroids and large rocks. But when Mercury is very close to the Sun, it falls into the sun when an asteroid or comet comes near it. These are either fallen into the Surya or become comet. There is no satellite because Mercury does not have the ability to make satellite by hitting the comet's orbit.