If you want a specific sole angle, i'd recommend mummification wrap and add a pillow under the soles (soles face up), then another pillow on top of the ankles for the ler to sit and straddle the ankles. The soles will be squished down into the pillow and unable to thrash around.
Date anyone you want that is over 18. If you feel uncomfortable dating someone a lot younger then don't. As long as the two of you get along and have fun together who cares what others think?