Surely now's the time as part of your exercise routine to include some flexibility exercises.
If you've never tried sucking yourself off give it a go...... Not possible for me unfortunately.... With my arthritis, I'd probably stick like that, which might be a bit embarrassing.
Alternatively, try fucking your own arse.........not sure if that's allowed on this forum.... Can't work out if it's a homosexual practice, shagging your own bum.
It can be done. Apparently there's examples on porn channels..... Only what I've heard