Yes. There are components in the semen that gel a little, like water and powdered Jell-O. For some people this gelling action is quite strong, making the semen appear clumpy. It's normal and does not affect your fertility. (For more, read JackinQ&A – Questions About Semen & Ejaculation.)
What do you think about when you masturbate or have sex? Would you tell your significant other if they asked?
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