9x22 "The One with the Donor"

After finding out they're both infertile, Chandler and Monica search for a sperm donor, but, after interviewing a potential donor, even though he is suitable — Chandler describes him as 'Spermtastic!' they realize they don't want a donor, so look to adoption. Phoebe finds out about Rachel's feelings for Joey when she and Rachel take Charlie shopping, and Rachel fears Charlie heard that she likes Joey. While getting ready to go to Mike's sister's party, Phoebe meets David, the scientist guy again. Ross has an interview for a conference in Barbados.