I'm asking for a friend, alright?

This is a genuine request. I don't even know if I'd call it a good idea but I don't know the actual person in question, just a relative of theirs. They've asked whether I might be able to find a suitable WG to take his cherry.
OK...20yr-old lad, Asperger's. Not extreme, but he's a socially awkward virgin. Based in Leeds area.
So, any recommendations for an understanding (and obviously mentally mature) WG for him to go with? I should imagine someone old enough to be his mum is not a good idea, but perhaps mid-20s to 30yrs old?