I am not sure if it is a generational thing or just how someone structures their values. I am 37 and I would be in a similar boat to you. I could not imagine sex with a woman unless we were exclusive and we were committed. I was always raised with relationships being developed on love first sex later. Maybe that makes me old fashioned too. It does concern me that those values will be a hurdle for women in my dating age range.
H(37) W(35) D8, D5, S3 T20, M13 BD 8/31/18 EA Discovered 9/13/18 Mediation 10/3/18 W files for D 10/12/18 W moves out 11/10/18 EA confirmed 12/25/18 D Final 1/10/19