Daily Mail - Women casually dating in their 50s and 60s

Daily Mail journalist would like to speak to a relationship/sex expert about why women might want to casually date instead of looking for committed relationships in their 50s and 60s, following Carol Vorderman's comments about having 'five special friends' who she dates on rotation.
The journalist would like to know:
- Why would women choose this option and at this stage in their lives?
- Have dating sites like Silver Singles/Senior Match made a difference?
- What about more general dating apps like Tinder/Hinge/Bumble/Feeld? Have they changed the dating landscape for people of all ages?