I thought the same thing
"
Felching is a
sexual practice involving the act of orally sucking
semen out of the
anus of one's partner. The act of sucking semen out of a
vagina is known as
creampie eating." wikipedea
Urban dictionary However states "
The act of sucking
semen from any human orafice, eg.
anus,
vagina, it can be done with a drinking straw when semen is deep inside the rectum.
Horace had enjoyed his anal intercourse
session with Bertie so much, that he decided to felch his own
semen from Berties
anus."
I would go that it is only for anal, whether or not you use a straw