What is the best way to collect sperm, masturbating into a cup, or when copulating using condom as c

By why, I mean if the sample has more quality, mobility, and quantity extracted by one method or the other.

either mode is fine because the quality of the sperm sample does not depend on the mode of extraction but on the gene and health of the donor, his sexual history, and the frequency of his ejaculation. if you are donating sperm, it is best not to ejaculate for a few days before the extraction. cheers!

p.s. said, instead of answering your emailed question i decided to answer you here so the public may also benefit from my wisdom.