You make a rather large boast and sadly, your interpretation is quite off the mark.
Catholics, as all Christians, ask other believers to pray for them. I may ask my neighbor to pray I find a new job. I may ask St. Anthony to pray for me to find my keys. In both cases, we are asking brothers and sisters in Christ to approach the Father on our behalf.
It is not a taught doctrine or otherwise, to belief either Our Lady, or the Saints in Heaven, bear the power of the Divine. To assume so would be a violation of the First Commandment.
Jews believe in the God of Abraham, but don’t recognize Jesus. Jesus, as a perfect Jew, believed His father was the God of Abraham. Catholics, following the example of Jesus, believe in the God of Abraham. Muslims claim to believe in the God of Abraham. Like the Jews, however, they do not believe in the Trinity.
Riiiigggghhhhtttt. Sure you are. Let's look at some of those prayers "asking for approach on your behalf".
I venerate thee with all my heart,
O Virgin most holy,
above all Angels and Saints in paradise,
as the daughter of the Eternal Father,
and to thee I consecrate my soul with all its powers.
"Virgin most holy" ey? "To thee I consecrate my soul"??? To Mary??? Really? And you claim that's asking for prayers on you behalf? Give me a break.
Another one.
O Mary, Virgin most powerful and Mother of Mercy, Queen of Heaven and Refuge of Sinners, we consecrate ourselves to thy Immaculate Heart. We consecrate to thee our very being and our whole life: all that we have, all that we love, all that we are. To thee we give our bodies, our hearts, and our souls; to thee we give our homes, our families and our country. We desire that all that is in us and around us may belong to thee and may share in the benefits of thy motherly blessing. [http://www.catholic.org/prayers/prayer.php?p=438]
Asking them to pray for you indeed.
Please don't insult the readers with those claims of "we don't pray to Mary" or "we only ask them to pray for us". Those prayers are all listed online for anyone to see.