The spam folder

I went into my sons account on his email and in the spam folder it had all these messages from women I guess. Definitely looked spammy. NONE were open. “Hey are you still looking for pussy on the side” type messages are there. I went to the site it’s some dating website, typed his email and put forgot password and there’s no email for his email In the account. How did he get those messages??? It’s a google email account. His emails look normal. PlayStation, some drug store like cvs. Normal things. Never suspected anything like that. So why are they in his account? What the heck.