dont care which age they lose their virginity but I can say
something about position. Frankly they hate all positions, the best
make love style they like is when you lick their sensitive soft
holes and use your fingers to stimulate them. Gentle lick at the
back of their ears and gentle caress on their breasts works wonder
too, the final trust with your brother is not the ultimate that
they crave for.
Trust me, they
prefer the sensual touches instead.