but that depends on use.

I like both, but the vagina offers more of a challenge, and is more interesting.

This depends completely on my partner. I went out with someone for a long time who had her best climaxes with greek.  In her case,  obviously.  I have gone out with others who most enjoy getting head, one who loved getting rimed most of all,  and a number who like manual and vibratory simulation of their vaginas and many who liked simple screwing. I like whatever get my partner the most turned on.  Anyone in the Philly area who has a strong preference, let me know by private message or e mail as I am always looking for either new people or to renew old friendships.