My understanding of a tulpa is that they were created by Vajrayana (tantric) Buddhist monks to prove the illusory nature of the mind and the senses, thus bringing the aspirant closer to nirvana. If you're making a tulpa to to indulge your senses, then that is the precise opposite of what the technique is intended for. Tantric practices have a reputation for being difficult, esoteric and dangerous.

Frankly though I think it's more difficult than most people realize, and the people saying they can actually see or touch their tulpa are just 14 year old girls roleplaying. Just call it an imaginary friend, that's really what it is.