It depends on the man and on the woman.
brest
adams apple
A horses doesn't have a 'favorite' body part. Picking out a favorite body part is a human attribute more concerned with vanity than anything else.
Well he first holds it in to place and then he slowly goes in and then they are now having sex im sorry this is not a proper answer but its all true for beginners :)
Body; Adam's apple. After: Adam
It varies form girl to girl.
his soulja... boy
Depends on each woman. I always like the eyes. They tell you a lot about him.
the arms i think
Because it is part of a Female body that some Males are attracted to. other body parts they are attracted to depends on what fetish (addiction) they have.
Every girls has different opinions and references. Not every girl will answer the same way about what their favorite part of their body is.
The water boy's favorite part of the brain is the hypothalamus, as it plays a key role in regulating thirst and water balance in the body.