I sure would go for no. 4
I have an older man as a friend, an intimate friend.
He is a real gentleman and knows how to please me, his objective is to please me and not to please himself.
He can make me going so hot, he is really one of the best lovers I ever had.
Yes I did, kind of.
It was not switching partners but I love it to share my loved ones with intimate close friends.
I am bi-sexual, and love it to see my fuck-buddy doing my girlfriend, the more she likes it the more I like it and get turned on.
My girlfriend and I love threesomes.