Your ego is likely the cause of failing shit tests, being overly self conscious and a whole range of other traits that make you appear unsuitable as a potential sexual partner in any given situation.

Meditation can be used to kill your ego, by quieting the mind, out of which the idea of the self originates. With practice you can stop the mental chatter in the background, which eliminates your notion of self and makes you realize that you're just a physical body with the ability to create self references based on your experience of the world around you.

Meditation is essentially very easy:

You choose one of these position:

http://imgur.com/dZdhtpX

You put on a timer for 10 minutes.

You stop to think (or focus on your breath if you can't simply stop thinking) and when thoughts arise you observe that you're thinking about something as if someone has shoved an object in front of your face, without trying to figure out any meaning behind it or assigning feelings to it and return to not thinking (or focusing on your breath).

Just as lifting, it's a mental strength exercise and the more you do it, the longer you will prevail and you can extend the meditation time the better you get.

While doing chores like cleaning you can try to focus on your physical actions as well, while blocking out the mental chatter in the background.

Once you get skilled, it's time to observe your thoughts and intended actions all the time, like a spectator, which will give you ample buffer time to modify what you say or do, before you say or do it.

The result should be a focus on the present moment, which essentially kills your ego, as you don't reference much beyond it anymore.