1. Emission of seed comes through talking about promiscuity, and also through that which one fell from his faith.
2. One who (intentionally) releases seed wastefully, in the end goes naked.
3. Through depression, one comes to having (lit. seeing) a wanton emission.
4. One who avoids eating food whose kashrut (kosher status) was (for what ever reason, found questionable and was deemed necessary to be) asked to an authority, he is saved from the impurity of wanton emission.