I currently have a FWB relationship with an amazing guy (he's attentive and lord boy puts in work). He is WAY more experienced than me (prior to this I was with someone for over a decade, he was my first and only until this).  Recently I have noticed that he likes/encourages me to be on top. This is the only way I've been able to see a smile from ear to ear with him. To be honest I don't feel strong enough physically to last in that position. Does anyone have any advice for this late bloomer.