Could my ex be right?

My ex and I are on good terms. There is no grudges between us and from time to time we have our talks. We were catching up with each other and told him I was seeing three guys. I didn't tell him nothing more other than I was seeing them. He thinks none of the guys will take me serious and really most of the guys I come across will only want sex from me. He wasn't being mean about it.

Could my ex be right?
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