Maun Ekadashi is a vow of silence and heightened self-restraint. In Jain practice, it is a time to purify the mind, speech and body by curbing senses and attachments.

• Speech: One remains silent or speaks minimally, avoiding gossip, harsh words, and pointless talk.
• Senses and thoughts: It is encouraged to guard the senses and train the mind to stay away from desires, including sexual thoughts. For householders, this means exercising brahmacharya in daily life—being mindful, restrained, and avoiding unnecessary sensual indulgence.
• If unwholesome thoughts arise: acknowledge them with equanimity, renew the vow of restraint, and practice repentance/resolve.

In short, yes, during Maun Ekadashi one should also limit or prevent sexual thoughts as part of overall sense-control and purity. For monks and nuns, the guidance is stricter (complete celibacy); for lay practitioners, the emphasis is on restraint and mental discipline within daily duties.