What's wrong with me – am I sterile?
That's unlikely. Unless you aren't ejaculating any fluid at all, the only way to tell if you're actually sterile is to have a sperm count done. A lot of factors go into the appearance and consistency of semen, including diet, ejaculation frequency, etc., so changing any of these can alter the way your semen looks. Also, it's easy to think that semen is simply sperm cells in water, but it's a much more complex substance than that. So it may have been the absence or presence of something other than actual sperm cells – such as sugars or proteins – that caused your semen to look different before.
Do you find yourself masturbating more often during some seasons than others? Why?
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