user-1: I'm being very mindful and aware nowadays.  My mind is now very much quite and I am able to watch handful of thoughts in day to day life.  The problem is at a particular instant of quite mind, sexual thoughts come with full vigour.  Don't know why. 
Is there any particular reason of sexual thoughts to come vigorously to nearly quite mind?  

user13709: Is there any particular reason of sexual thoughts to come vigorously to nearly quite mind?
Thoughts arise and disappear on their own. If you are plagued by any particular thought, consider that relishing is the root of suffering. Find that delight, look at it and simply understand that "this is not mine, this is not who I am, this is not my self." This simple declaration will loosen your grip on the thoughts and they will disappear. Thoughts and feelings persist because there is relishing. Disavow the relishing and the thoughts and feelings pass like clouds in the sky. Be mindful of your breath as you do this. The breath is very much a part of your life. The thoughts simply come and go.

user-1: The reason is simply habituation.
The mind is used to input, any input will do. Whether it's thoughts or sound or images, and whether the thoughts are about sex, drugs, rock-n-roll doesn't really matter.
More interesting is that you consider memories popping up a problem. So, there is wanting there. Maybe wanting the peaceful state to continue? Which it won't since everything is impermanent. 
There is more to uncover. Keep watching.

user8157: Sexual thoughts arise from a combination of the sensuality element (SN 14.12) & the ignorance element (SN 45.1). Because the mind still ignorantly believes sex can bring happiness & lasting pleasure, the instinctual & habituated sexual impulse (element) & thoughts still arise. In short, they arise due to wrong view. 

-1: <p>I'm being very mindful and aware nowadays.  My mind is now very much quite and I am able to watch handful of thoughts in day to day life.  The problem is at a particular instant of quite mind, sexual thoughts come with full vigour.  Don't know why. </p>

<p>Is there any particular reason of sexual thoughts to come vigorously to nearly quite mind?  </p>
 13709: <p><strong>Is there any particular reason of sexual thoughts to come vigorously to nearly quite mind?</strong></p>

<p>Thoughts arise and disappear on their own. If you are plagued by any particular thought, consider that <a href="https://suttacentral.net/mn1/en/sujato" rel="nofollow noreferrer">relishing is the root of suffering</a>. Find that delight, look at it and simply understand that "this is not mine, this is not who I am, this is not my self." This simple declaration will loosen your grip on the thoughts and they will disappear. Thoughts and feelings persist because there is relishing. Disavow the relishing and the thoughts and feelings pass like clouds in the sky. Be mindful of your breath as you do this. The breath is very much a part of your life. The thoughts simply come and go.</p>
 -1: <p>The reason is simply habituation.</p>

<p>The mind is used to input, any input will do. Whether it's thoughts or sound or images, and whether the thoughts are about sex, drugs, rock-n-roll doesn't really matter.</p>

<p>More interesting is that you consider memories popping up a problem. So, there is wanting there. Maybe wanting the peaceful state to continue? Which it won't since everything is impermanent. </p>

<p>There is more to uncover. Keep watching.</p>
 8157: <p>Sexual thoughts arise from a combination of the sensuality element (<a href="https://suttacentral.net/sn14.12/en/sujato" rel="nofollow noreferrer">SN 14.12</a>) &amp; the ignorance element (<a href="https://www.accesstoinsight.org/tipitaka/sn/sn45/sn45.001.than.html" rel="nofollow noreferrer">SN 45.1</a>). Because the mind still ignorantly believes sex can bring happiness &amp; lasting pleasure, the instinctual &amp; habituated sexual impulse (element) &amp; thoughts still arise. In short, they arise due to wrong view. </p>
