Has your promiscuous past made it difficult for you to stay loyal in a committed relationship?

I have been dating my boyfriend for a long time and currently he told me that he was promiscuous in the past. After listening to him, I was horrified.

Because this is my first relationship and I was a virgin before meeting my boyfriend. my bf is my everything first.

I only wanted relationship sex, that's why I never did one night stands.I don't know how to understand my boyfriend's past. Those who have high body count, please answer some of my questions.

1: Is it possible that someone with a high body count will remain completely faithful in a committed relationship?

2: Do those who have been wild in the past have trouble staying faithful in a committed relationship?

3: And even when you are in a relationship, your old habits continue like flirting with other girls, being flirtatious with other girls?

4 : what if a Beautiful and Hot girl approaches you for a ONS? TL;DR : Am I right to feel insecure here?