Why does he do this when we hang out?

Whenever I hang out with this guy I'm hooking up with he always explains himself. Like if his phones goes off he goes oh that's my friend Connor. He is like always trying to prove that he has nothing to hide. One day he was like it feels good to have 'another woman's touch'. My response was, 'another woman?'. He quickly said, 'besides my mom'. Another scenario is... after we hooked up recently he was like your the only person I hooked up with since last time. Like why is he saying and doing these things?
Why does he do this when we hang out?
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