They can, especially if they engage the pelvic floor muscles (doing a Kegel). The motion of tightening everything up before a heavy lift.
I don't know what can cause that. I have experienced the same, for me I think it was depression and stress. I'm still kinda trapped in depression, but I'm on my way out of it now.
But diet is important as well. I personally eat 7 to 14 eggs per day to make sure my body has the fuel to produce testosterone. The body needs cholesterol in order to produce testosterone. I also do my best to eat alot of meat. Some days it's not so good, I forget to eat. There was a myth in the past about consuming cholesterol, but it's busted now.
Diet is so important to our body and how it functions.