Is it normal for men to like and searched for s3xy ladies in SOCMED?

I tried to do deep search my partner's phone '32M' and saw that he follows, visited profiles and likes a lot of s3xy girls on every SOCMED. We're together for almost '6y' I'm '25F. We already have 2 kids and currently pregnant for the 3rd. Is it normal? Is it really men's nature? Please enlighten me because it really bothers me.