My theory about past relationships is this: start accepting 3–5 exes, 5–8 FWBs, a body count of 5–8, and 1–2 abortions as the new normal. Otherwise, you’ll spend your whole life being delusional, thinking they never had any past relationships. And when you eventually find out about their exes or FWBs, you’ll have no option but to cope harder and maybe even cry, feel cheated, or end up devastated.
You as a man should be comfortable with yourself and avoid people/situations which disturb your peace. Even if the path gets solitary and uncomfortable at times, it's better to be with the demons you know than to throw everything you care for away in search of unknown heavens.