My boyfriend’s touch no longer turns me on

When my ex (very toxic guy glad I’m not with him) used to touch me, it sent jolts through me. I was very aroused when he touched me and I desired sex with him intensely. Strangely I felt very guilty and regretful and depressed after sex

My current boyfriend is sweet and kind and he is handsome. At the start I had butterflies when he touched me, but now I don’t get aroused instantly and his touch isn’t like electricity like with my ex. I don’t feel as much sexual urge for him either. However after sex I don’t feel guilt or regret and I feel happy.

I’m very confused by this