Does anyone experience this? Especially males?

After sex I get very irritable and depressed. I believe it's because semen contains natural anti-depressants and once those leave the body I get depressed. I haven't found a solution for this, although it didn't used to be such a problem as a kid. I think maybe it indicates I'm already in a borderline depressed state, or that my body nutrition is poor. It's a very depressing thing to think about but has plagued me for a very long time. Just wondering who else experiences this. The obvious solution is the most difficult one...