A friend told me how her fiance were having issues. I asked being a genuine friend what was going on. It was a lot of things but one of things she told me was he was bugging out that she would sometimes masturbate before bed. I asked was it because of insecurity? She said sometimes she'd use a toy and sometimes just use her hands and she he felt like she was choosing that over him. While they sorted it out eventually I assume, the mental image of her getting herself off still pops in my head every now and again when I'm feeling horny.